Fulmer underwent successful ulnar transposition surgery Tuesday, Anthony Fenech of the Detroit Free Press reports.
Fulmer will now begin a recovery process that is supposed to take between three and four months as he works to get back to full health for next season. Barring any setbacks, he's expected to be ready to go for spring training. The 24-year-old ended his sophomore season with a 10-12 record to go along with a 3.83 ERA, 1.15 WHIP and 114:40 K:BB over 164.2 innings (25 starts).