It's probably the correct decision. He's 42 in July, and pace bowling is punishing on the body, and he's had his share of injuries down the years. Those injuries take longer to recover from as you get older. Also, he's unlikely to be more of a threat as the years are ticking by. He's been a fantastic servant to England down the years. 3rd in the list of all time test wicket takers, only behind Muralitharan and Warne. Both of them phenomenal spinners. Jimmy is nearly 100 wickets ahead of the second placed quickie (Broad, who's also retired now). I'm sure he'll get plenty of media work; he seems at ease behind the mic.