Dustin Molleken

Molleken made his MLB debut as a 31-year-old in 2016, though he spent most of his time with Triple-A Toledo. In his 8.1 innings, he posted a 4.32 ERA, slightly higher than his 3.58 Triple-A ERA. Molleken's walk rate is obviously a factor in what is holding him back, as he failed to post a walk rate below 4.25 BB/9 in his last three seasons of Triple-A ball. His 2016 walk rate was 4.49 BB/9 with Toledo and 5.40 BB/9 with the Tigers. He elected for free agency this offseason after being sent outright to Triple-A, though it's doubtful many teams will be clamoring to get their hands on a 32-year-old who spent the last five seasons in Triple-A. If he can begin to lessen his walk totals, it would go a long way in helping him latch on with another major league club.