Montas made his MLB debut in 2015 with the White Sox as both a starter and reliever and was expected to have a shot at the Dodgers' 25-man roster out of spring training. Given his potential as both a starter and reliever, his role in 2016 could be dictated by need when he recovers. This shouldn't affect the 22-year-old's future potential too much, but it's an ailment that could nag even after he returns.
Satterwhite produced a 4.38 ERA and 1.43 WHIP while boasting an impressive 8.88 K/9 over 72 innings of work for Triple-A Las Vegas in 2015. The 29-year-old will begin 2016 in the minor leagues.
One of the top prospects in the Rockies organization after being acquired in the Troy Tulowitzki deal, Hoffman pitched well at the Double-A level. Although he shows promise, he'll likely head back to the minors after spring training to pitch more against upper-level hitters.
Castro pitched well with Triple-A Albuquerque last season, but he failed to perform well once he received a promotion to the majors. It will be tough for Castro to crack the Rockies bullpen unless significant improvements are made.
The 2014 first-round draft pick hasn't pitched above High-A in his career, but the Rockies like him enough to bring him to big league camp during spring training. Despite this, he'll likely head back to the minors for seasoning after spring training concludes.
Flande spent a lot of 2015 pitching in the majors with the Rockies, but only produced a 4.74 ERA, which led the Rockies to non-tender him in December. He'll return to the Rockies for 2016, although the left-hander will likely serve as organizational depth unless he can improve a fair amount during the spring.
Luebke had his 2016 option declined by the Padres after two Tommy John surgeries since 2012 and another elbow injury in July derailed his tenure with San Diego. The left-hander pitched well in the majors from 2010-2012 with a 3.25 ERA, though, so he could get some looks for the fifth rotation spot, although it's probably more likely that he'll begin 2016 in the minor leagues.
Lamb went under the knife for disc surgery in December, but was originally expected to be ready in time for the start of the season. Manager Bryan Price recently indicated that the lefty was a bit behind schedule though, so mid-to-late April seems to be the target date at this point.
A former top prospect, the 26-year-old no longer has the glimmer he once did. He'll look for a fresh start with a new organization in the Padres, but spent most of the 2015 campaign on the disabled list following shoulder surgery in 2014.
Given that he's coming back from surgery to repair the labrum in his pitching shoulder, there isn't a firm timetable for Ryu's return. When asked about his recovery after his first mound session in January, Ryu said that he hopes to be ready for Opening Day. Nevertheless, the Dodgers' increased rotation depth affords them extra time if Ryu needs to begin the season on the disabled list and progress through the final stages of his recovery beyond the first week of April. If Ryu is healthy and ready to pitch on Day 1, Alex Wood may end up in the bullpen, or at Triple-A to begin the season, but it would hardly be surprising to see the Dodgers take a cautious approach with Ryu's recovery.