2. He's pitching the best baseballl of his career as a Tiger
E-rod had a couple of good years in Boston, but he never pitched like this. This is a borderline ace level season he's having.
His ERA, walks per nine, and home runs per nine are all the lowest of his career. He's on pace for the third-highest WAR of his career. If he starts racking up some more strikeouts, he could eclipse his career high in that category.
He's doing this all in a Tigers uniform. He was obviously an Al Avila signing, but Scott Harris has said that he wants to sign players that can get better in Detroit, and E-rod has certainly done that.
If he likes it in Detroit, and he's pitching better in Detroit, it's hard to see why he would leave.