Cobb was scratched from his minor-league start Sunday due to left lower-back tightness, Marc Topkin of the Tampa Bay Times reports.
Cobb missed the majority of the 2016 season while recovering from Tommy John surgery, but has appeared to be healthy during spring camp thus far. This is the first news of any sort of back issue, so this late scratch is certainly something worth monitoring. The 29-year-old will be an important piece to the Rays rotation in 2017.