As part of the relocation to Washington D.C., the Nationals selected Stammen in the 12th round of the 2005 MLB Draft.
He played his collegiate baseball at the University of Dayton and was initially drafted with the intention of being a starting pitcher.
However, after posting back-to-back 5.00+ ERA seasons, he was optioned to Triple-A Syracuse at the beginning of the 2011 season. He returned in June, as a relief pitcher, and posted a 0.87 ERA in seven appearances.
And from that day forward, Stammen was permanently a reliever. He’s never had an ERA higher than 3.84, which came in 2014.
Last year with the Padres, he posted a 3.29 ERA in 76 appearances.