Clint Dempsey scored a hat-trick, including two goals in the final five minutes, as Seattle Sounders stole a 4-4 draw at Portland Timbers.
In the first meeting between the arch-rivals in the 2014 MLS season, Seattle skipper Dempsey struck in the 85th minute and then converted a penalty two minutes later as the Sounders recovered from being 4-2 down to claim a point at Providence Park in Portland.
Seattle's late comeback kept the Timbers winless in five games this season and added another chapter to the rich history between the two clubs.
Saturday's game was the 85th meeting between the Sounders and the Timbers, who also played against each other in the old North American Soccer League and first clashed in 1975.
The visitors hit the front in just the third minute with former Portland striker Kenny Cooper tapping in for Seattle after Jalil Anibaba had knocked a corner back across goal.
But in a sign of things to come, Portland continued the hectic start to the contest six minutes later with Diego Chara stealing the ball off Gonzalo Pineda before converting from the edge of the D for his first goal since September 2011.
Cooper forced Timbers goalkeeper Andrew Weber into a fine save soon after and the hosts counter-attacked immediately, with Darlington Nagbe hitting the post, before Diego Valeri gave Portland the lead in the 14th minute.
Michael Harrington picked out Valeri on the corner of the six-yard box and the Argentine midfielder spun on the ball before smashing his shot in off the crossbar from close range, but the Timbers' lead lasted just 10 minutes with Dempsey scoring his first goal thanks to an assist from Obafemi Martins.
The score remained 2-2 until half-time but 10 minutes after the break, Chara - who had suddenly got a taste for scoring again - was allowed space to push forward and slammed the ball into the top corner from 20 yards.
Portland looked to have killed the game off just two minutes later when Maximiliano Urruti picked Anibaba's pocket and then curled an exquisite shot into the top corner to give the hosts a 4-2 advantage.
The Timbers almost increased their lead again soon after when Norberto Paparatto's header slammed into the crossbar from a corner but the ball was kept out of the net by Seattle fullback DeAndre Yedlin, who was stationed on the line.
Yedlin's intervention seemed even more crucial when Dempsey struck with five minutes left plus stoppage time; the United States international poking the ball home to drag the Sounders back into the contest and Seattle's comeback was just about complete two minutes later when Ben Zemanski tripped Yedlin in the penalty area.
Dempsey made no mistake from the spot to notch his first MLS hat-trick and take Seattle to seven points from five games.
In the Texas derby, Western Conference leaders FC Dallas thrashed Houston Dynamo 4-1 with three goals in the final half hour.
Michel opened the scoring for Dallas from the spot in the first half in Houston but Dynamo were level at half-time thanks to Ricardo Clark's header.
But the visitors blew the game open after Houston's David Horst was red-carded on the hour mark with Je-Vaughn Watson heading the resultant free-kick into the net before Giles Barnes' own goal in the 68th minute put Dallas 3-1 ahead.
Watson capped off Dallas' fourth win of the season with a cool finish in the 70th minute.
An injury-hit Toronto FC showed they can win without Jermain Defoe with Michael Bradley and Issey Nakajima-Farran scoring in a 2-0 triumph at Eastern Conference leaders Columbus Crew, while Montreal Impact drew 2-2 with New York Red Bulls.
In other results, the replay of last year's MLS Cup between Sporting Kansas City and Real Salt Lake finished 0-0, Colorado Rapids defeated Vancouver Whitecaps 2-1, DC United won 2-0 over New England Revolution and Chicago Fire claimed a 2-2 draw with Philadelphia Union.
|Bolton chairman Phil Gartside dies aged 63|
|Palermo turn to Bosi after Barros Schelotto exit|
|Ben Arfa considered retirement from football during exile|
|Bilic: We paid the price for cup progress|
|Griezmann happy to stay at Atletico|
|Wales to face Sweden in final Euro 2016 warm-up|
|Varela hopeful of long United career|
|Ki: I had ice on my face for two days|
|Niasse settling in well, could face West Brom - Martinez|
|Stevens leaves Hoffenheim on health grounds and retires|
|Diaby nearing return after near 18-month lay-off|
|Nasri would love to finish career at Manchester City|
|Captain Howedes extends Schalke stay|
|M´Vila keen to stay if Sunderland survive|
|Johnson admits child sex and grooming charges|
|Amazing Mahrez is one of Premier League´s best - Ulloa|
|Ronaldo, Messi rivalry good for football - Zidane|
|Barros Schelotto leaves Palermo|
|Age is just a number - Ilori defends Klopp´s team selection|
|Messi, Suarez and Neymar rested for Copa second leg|
|Madrid can dream of trophies under Zidane - Raul|
|Ancelotti: Italy job is a decade away|
|Reus will become a monster, says Dortmund boss Tuchel|
|Young Tottenham stars don´t know their limits - Lloris|
|Niang happy at Milan despite Leicester interest|
|Ticket price rise means more tourist fans, warns football supporters chairman|
|Ogbonna revels in first West Ham goal|
|Copa Libertadores Review: Huracan, River Plate advance to group stages|
|Klopp backs Benteke to rediscover goalscoring form|
|Turan will not leave Barca for China - agent|
|Beating Chelsea more difficult without Mourinho - Motta|
|Tuchel praises Dortmund for ´perfect game´|
|Klopp rues Liverpool wastefulness in FA Cup loss|
|Allegri: Chelsea rumours unfounded|
|Bilic feels weight of history after Liverpool win|
|Coupe de France Review: Second tier Sochaux stun Ligue 1 Monaco|
|West Ham 2 Liverpool 1 (aet): Ogbonna sinks Klopp´s men in cup thriller|
|Football League Review: Rhodes rescues a point to send Boro top|
|Stuttgart 1 Borussia Dortmund 3: Aubameyang helps Tuchel´s men into last four|
|Kyle Allen blames chaotic Texas A&M culture on Johnny Manziel era|
|Dortmund fans stage protest against ticket prices for Stuttgart game|
|Bayer Leverkusen 1 Werder Bremen 3: 10-man hosts dumped out|
|Ferdinand fears title wilderness for United|
|Carvalho lands new Sporting deal with €45m buy-out clause|
|Ben Arfa out for at least four weeks with hamstring injury|
|Neville´s Valencia woes welcomed by Crespo|
|Ozil key to Arsenal´s title hopes - Rosicky|
|Zika threat could keep Solo from Rio Olympics|
|Blanc pleased to have solved David Luiz matter|
|Atletico midfielder Partey suffers thigh strain|
|Dickov: Leicester title run built to last|
|Guardiola not a menace for our players, says Luis Enrique|
|Mexico v Senegal: Osorio believes in youngsters|
|Celta Vigo v Sevilla: Krohn-Dehli not taking Copa del Rey final for granted|
|Madrid confirm Marcelo shoulder dislocation|
|Injury rules Chiellini out of crucial Juve games|
|Oblak extends Atletico deal|
|Blanc hints PSG could move for Ben Arfa|
|Luis Enrique urges Neymar to cope with off-field distractions|
|Carrick: Manchester United not throwing in towel|
|Neville determined to turn things around at Valencia|
|Guardiola hails Lewandowski professionalism amid Real Madrid and PSG rumours|
|Guardiola wary of ´aggressive´ Bochum|
|Premier League reveals new logo|
|West Ham open Payet contract talks|
|I could leave Barcelona for Guardiola, says Busquets|
|Giggs can be Manchester United´s Guardiola - Robson|
|Zidane has everything to become a great coach - Ancelotti|
|Carragher: Liverpool got it wrong on ticket prices|
|Neymar will be at Barcelona for years, claims director|
|Eder talks up Inter´s Scudetto chances|
|Larsson: Watching Barca is like playing FIFA|
|City recruit Wilkinson hoping to debut in Melbourne derby|
|Allegri will join Chelsea, says former coach|
|Zanetti: No need to compare Maradona and Messi|
|Vardy: I never expected Leicester to top Premier League|
|Capello: Ronaldo has at least three years at the top|
|Klopp hoping for Sturridge revival|
|Bilic wants new contract to keep Payet at West Ham|
|Shelvey can be as good as Cabaye - Sissoko|
|Rooney leaps to Depay defence after Chelsea error|
|Januzaj, Varela injured in United Under-21s win|
|Valencia v Barcelona: Luis Enrique eyes record as Neville stands on the brink|
|Espanyol 0 Real Sociedad 5: Vela scores stunner in ruthless display|
|Cruyff would have preferred Guardiola at Manchester United|
|Questioning Ronaldo is an insult - Aduriz|
|Peterborough United v West Brom: Berahino set for another chance|
|Barcelona confirm medical tests for Messi|
|Ajax defender Riedewald out for season with broken ankle|
|Barcelona is the best place for Neymar - Mascherano|
|Clement axed as Derby head coach|
|Chelsea defender Zouma out for the season|
|Rodgers: I´ve turned down Swansea and four other clubs since Liverpool|
|Russia to invite Blatter and Platini to World Cup 2018|
|Robben rejoices as Ribery resumes Bayern training|
|Terry as good as ever, says Azpilicueta|
|Struggling Rotherham sack Redfearn|
|Courtois feels Champions League or FA Cup glory would save Chelsea´s season|
|Paris Saint-Germain v Lyon: Genesio vows ´unlucky´ visitors will have a go|
|Liverpool cancel Q&A to discuss ticket price furore|
|Klopp: Liverpool won´t follow Payet to the toilet|
|Bochum v Bayern Munich: Alonso braced for intense month|
|Ronaldo: Two more years at Real Madrid and then we´ll see|
|No problems with Kagawa says Dortmund boss Tuchel|
|Laporte denies saying he would reject Barcelona|
|Impressive Sturridge and returning Coutinho in contention - Klopp|
|Leicester were afraid of Italian tactics - Ranieri reveals his secret|
|Coentrao sustains fractured foot|
|Barcelona director at ease over Neymar future|
|Mata touched by reaction of Chelsea fans|
|Alonso: Guardiola departure not a distraction|
|Thiago Silva: PSG can stay unbeaten all season|
|Cristiano Ronaldo will keep breaking records - Hugo Sanchez|
|Bilic: Klopp will be back because he is a leader|
|Mancini dismisses Inter title bid as ´a closed story´|
|Guardiola took Bayern for a ride - Hamann|
|Mihajlovic demands more from Balotelli|
|Campbell urges clubs to give black managers a chance|
|Marchisio expects Napoli showdown to be decisive|
|You can´t expect to score lots of goals in every game - Modric|
|FFA hit Wanderers with show cause notice|
|We did not deserve Madrid defeat - Granada coach|
|Mata frustrated with Chelsea draw|
|Valencia won´t sack Neville - Mendieta|
|Senna makes Villarreal return|
|Spalletti: Roma need to cut out lapses|
|China will break $100m transfer fee - Cahill|
|Ranieri: Don´t look down|
|Guardiola reinvented football - Alaba|
|Tottenham fear no one - Kane|
|Flores believes Tottenham are Premier League´s best|
|Henderson: Walkout no excuse for Sunderland collapse|
|Neville bullish about Valencia future|
|Ramos: Modric key for Madrid|
|La Liga Review: Luis Enrique matches Guardiola record, Modric rescues Madrid|