Rosscup only threw 21.1 innings last season, 11.1 with the Dodgers and the rest in the minor leagues. While he gave up six earned runs in LA, he did post a staggering 20/4 K/BB ratio, good for a 15.88 K/9.
His slider was and still is his bread-and-butter. He threw it over 50% of the time in last year’s small sample size, posting a 19.5% swinging strike rate and a 37.9% o-swing rate, both well above the league average. Those numbers have helped him hold left-handed hitters to a paltry .138/.266/.275 slash line over his 65.2 big league innings – numbers that dwarf those of Daniel Stumpf, Detroit’s current LOOGY.
Rosscup is 30 and not exactly a building block, but Stumpf has hardly impressed in Detroit and Blaine Hardy projects to be a potential rotation piece or trade bait, meaning the team could use another lefty stopper like Rosscup.
The Detroit Tigers only have one spot on their 40-man roster, but Rosscup is clearly a step above fellow left-hander Ryan Carpenter. If I was Al Avila, I’d strongly consider adding Rosscup on a minor league deal and waiving Carpenter to clear a spot. He’d have to compete alongside fellow free agent addition Jose Fernandez, another left-handed reliever.
However, Rosscup’s experience and strong slider make him a nice candidate to be a part of Detroit’s bullpen next season, if Avila chooses to go after him.