Some fans do not like this signing because his fastball velocity is slow.
Yes, his average velocity is just over 85mph, which is very slow compared to other pitchers in the league
However, he doesn't throw straight fastball.. According to fangraphs, most of his fastballs are sinking fastball.. Which is similar to Zach Britton. That means he can induce a lot of groundballs. He also has a great breakingball around 80mph (I don't know if it is slider, slurve, or knuckle curve)..
He also played with the Tampa Bay Rays, so he is familiar with the division.
He is far better than Blevins or Breslow