Dempsey's return to MLS Cup another big moment in a career full of them

Taylor Twellman and Kasey Keller break down Seattle's clinical performance against Houston and transformation under head coach Brian Schmetzer.

TORONTO -- During Clint Dempsey's five-month layoff after being diagnosed with an irregular heartbeat last season, few moments were as poignant as the Seattle Sounders' final practice before last year's MLS Cup final.

As his teammates were jovially participating in group drills and walking through set plays, Dempsey was alone down near one of BMO Field's corner flags, doing some light conditioning. As the Sounders prepared for the biggest game of some of their lives, Dempsey was just beginning...