Sadly for Doyle, he was about replacement level for the next two seasons and was out of baseball after the 1977 season. In December 1977, the Red Sox replaced Doyle with the very man who had replaced him in California: Jerry Remy. The Sox gave up pitcher Don Aase, who would have a couple of mediocre seasons starting for the Angels before becoming a very useful reliever. Remy never became a star, and the Sox probably missed having Aase in the long run. Still, Jerry was a fan favorite and useful player who has made quite a nice career for himself as the Sox color commentator.
So, there you have it. Remy displaced Doyle so that he could help the 1975 Red Sox and Remy became the starting second baseman after Doyle's departure. Interesting how that worked out.