Ross and Tanner Roark would replace Jordan Zimmermann and Doug Fister in the rotation as things stand, although GM Mike Rizzo could still bring in another starter through trade or free agency, and a big spring from a prospect like Lucas Giolito could create a job battle. Ross had a successful major league debut last year, posting a 2.80 ERA and 47:4 K:BB ratio through his first seven big league starts (45 innings) before fading late.
This was Wieland's second year garnering arbitration eligibility. The 25-year-old right-hander made two starts late in the season for the Dodgers, recording a 8.31 ERA and 1.73 WHIP in 8.2 innings. He wasn't particularly effective with Triple-A Oklahoma either, putting together a 4.59 ERA and 1.41 WHIP in 113.1 innings, but he could be a candidate to join the Dodgers during the season if injuries effect the starting rotation.
The 30-year-old received a major-league contract but will take a steep pay cut after making $8.8 million last season. Norris was clobbered to the tune of a 7.06 ERA in 18 appearances (11 starts) for the Orioles last season before being released, and then pitched exclusively out of the bullpen after signing with the Padres in August. It's uncertain what role he will take on with Atlanta, but it's at least possible he could return to the rotation for the rebuilding Braves.
Hellweg spent the 2015 season in the Brewers' minor league system and was his first year coming off of Tommy John surgery. He became a free agent this offseason and has decided to sign with San Diego, where he will try to climb his way through their minor leagues in 2016.
The strikeout rates have fallen as Stratton has moved up the ladder, dropping to 6.6 K/9 with the move to Triple-A Sacramento in 2015. Stratton was able to enjoy some success last season, regardless, posting a respectable 3.86 ERA and 1.31 WHIP over 17 starts for Sacramento. He figures to be a spot-start option for the big club in 2016.
A 50-game ban for testing positive for a stimulant kept Mejia off the mound until June, but he went on to post a 2.45 ERA and 1.09 WHIP in 12 appearances (nine starts) with Double-A Richmond. This amounts to a procedural move to protect Mejia from the Rule 5 draft, as it seems like a bit of a reach to think he could be a regular option for the big club in 2016, unless the team were to move him to the bullpen.
The 6-foot-3 right-hander turned in a 2.85 ERA over 123 innings in the PCL last season, allowing just six home runs and 32 walks. His FIP was 70 points higher than his ERA, and his stuff simply is not good enough to generate a lot of strikeouts, but Blackburn could find himself in the running for a rotation spot if there is an injury in spring training.
The lefty has made a quick rise since being drafted in the fifth round out of Creighton University in 2012, opening his third professional season at Triple-A Sacramento and holding his own in the PCL throughout the year. He may never strike out enough batters to be fantasy-relevant in mixed leagues, but Blach has shown great control and may be one of the team's top injury-replacement rotation options during the year.
The move was to protect Brice from the Rule 5 draft. However, he is not much of a prospect, and shaky control could lead to a bullpen role long term.
He is probably a top-10 prospect in the Marlins system, but that is only because it is such a bad system. Garcia posted a 4.91 ERA while striking out 35 over 36.2 innings (seven starts) at Double-A last year, and it's possible that he ends up pitching out of the bullpen long term.