Nick Cafardo of the Boston Globe has the story:
Aaron Cook, RHP, free agent — The former Rockies and Red Sox pitcher, one of the fastest workers in baseball, is looking to make a comeback after he was forced to shut down after experiencing a tired arm in late July. Cook is fine now and looking for another chance. He did not pitch in the majors last season, making eight starts with Triple A Colorado Springs.
Cook posted a hideous 8.15 ERA in those eight Triple-A starts, yielding 56 hits and 38 runs (32 earned) in just 35 1/3 innings. But he’s only 34 years old and he feels rejuvenated after sitting out the second half of the 2013 campaign. Cook should be able to land a non-guaranteed minor league contract and camp invite before the start of spring training next month.
The righty owns a 4.60 ERA (103 ERA+) in 1,406 1/3 career innings at the major league level.