Gordon Wittenmyer, who serves as a beat writer for the Chicago Sun-Times, explains this situation:
Cubs manager Dale Sveum said he anticipates right-hander Scott Baker getting his first spring start sometime in the middle of March, then opening the season on the disabled list and – barring setback – making his Cubs debut sometime in mid-April.
Baker underwent Tommy John reconstructive elbow surgery on April 17 of last season, so he’ll be a full 12 months removed from the procedure when he first takes the mound for Chicago.
The 31-year-old right-hander signed a one-year, $5.5 million free agent contract with the Cubs in November and could become trade bait around this year’s July 31 deadline if he can get back on track quickly.
Baker had a 3.14 ERA, 1.17 WHIP and 123/32 K/BB ratio in 134 2/3 innings with the Twins in 2011.