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.
Pitcher David Phelps has a torn UCL and will undergo Tommy John surgery, ending his 2018 season, the Mariners announced on Wednesday. Phelps was making brief one-inning stints in the Cactus League as he worked his way back from a procedure to remove a bone spur from his elbow last September. He said he felt the ligament tear on his final pitch against the Angels in his March 17 appearance.
Phelps, 31, was expected to set up for closer Edwin Diaz. The right-hander, between the Marlins and Mariners last season, posted a 3.40 ERA with a 62/26 K/BB ratio in 55 2/3 innings. He and the Mariners avoided arbitration in January, agreeing on a $5.55 million salary for the 2018 campaign. Phelps will become eligible to become a free agent at the end of the season.
As the Mariners noted in their statement, the expected recovery period for Tommy John surgery is 12-15 months, so this very likely cuts into Phelps’ 2019 season as well.