This guy is scary good. Gonzalez was a 30th round pick of the Pirates in 1997 and moved through the organization as a starter until he hit high-A in late 1998, at which point he imploded. He was moved to the pen in 2001 and pitched well, at which point the Pirates moved him back to the rotation. He made it to the big leagues, as a reliever, in 2003, but didn’t pitch well in a LOOGY role. The Pirates twice tried to trade him to the Red Sox that year, but neither trade went through. “Players the Red Sox wanted but didn’t get” is a useful type to acquire.

In 2004, used as a regular old reliever instead of a specialist, Gonzalez exploded onto the scene with a 1.25 ERA. In 2005, he was merely very good, with a 2.70 ERA. In 2006, he was the Pirates’ most-normal closer, putting up a 2.17 ERA and converting 24 of 24 save situations. In all three years he’s been limited to about 50 innings; last year’s 54 was a career high. His elbow is touchy, but when he’s healthy he’s a stud.

For his career, lefties have hit .179/.273/.246 against him… but righties have only hit .218/.313/.312. Last season he held lefties to a .163 average. Allowed one homer all season. Throws fastballs about 2/3 of the time, mostly sliders the rest; the heater tops out at 98 and is usually in the mid-nineties. Health is the only concern. 28 years old, three years away from arbitration, and the best reliever in the National League.

Mike Gonzalez Statistics – Baseball-Reference.com