Recognized worldwide as an elite poker tournament talent, Jason Mercier made headlines in April '08 when he won the EPT San Remo event for 869,000 Euros. Six months later, he earned a victory in the London European Poker Championship High Roller event for another 516,000 GBP. In June 2009, "treysfull21" won the WSOP Event #5 ($1,500 Pot Limit Omaha) for $237,415. In October 2009, Jason placed 4th in the WSOP Europe Main Event for over $440,000 and then finished 3rd in the 2010 LAPC High Roller event for $141,800.

One of his largest online tournament cashes came in September '10, when he was victorious in the PokerStars WCOOP Event #42 ($1,000+50 NLHE Two-Day) for $435,900 following a three-way final table deal. In May '09, he won the FTOPS $100 rebuy event for $86,600.

Won his second WSOP bracelet in June 2011 in a $5,000 Pot Limit Omaha tournament for $619,000. Won his second WCOOP bracelet in late September 2012 in a $10,300 Eight Game High Roller tournament, beating a final table that included Daniel Negreanu and Scott Seiver. In September 2013, he final tabled a WCOOP $700 NLHE tournament for $229,000 after a four-way chop.

Jason Mercier Wins WCOOP $1,050 NLHE Two Day Event Sep 21, 2010

Heads-Up with Jason Mercier (treysfull21)

Jason Mercier: "I'm Hungry to Win a Bracelet This Summer"

Jason Mercier (treysfull21) Wins First SCOOP Title

Jason Mercier Wins Third SCOOP Title of 2015