Tampa Bay Rays
Grant Balfour has thrown 8,488 pitches that have been tracked by the PITCHf/x system between 2007 and 2015, including pitches thrown in the MLB Regular Season, the MLB Postseason and Spring Training. In 2015, he has relied primarily on his Fourseam Fastball (90mph) and Slider (85mph), also mixing in a Sinker (90mph) and Change (85mph). He also rarely throws a Curve (82mph).
Basic description of 2015 pitches compared to other HP: