Entercom Boston announced today that WEEI mid-day host Dale Arnold will be part of the Red Sox radio announcing rotation this season, filling in the majority of games that Dave O’Brien will miss this season due to his ESPN duties. Entercom studio host Jon Rish will fill in during the remaining games.

O’Brien will be greatly increasing his Red Sox duties, calling a minimum of 135 games this season alongside Joe Castiglione, who enters his 26th season of calling Red Sox radio broadcasts. As mentioned, Arnold will fill in for most of the games that O’Brien misses, and likely for any that Castiglione might miss as well, with Rish picking up the rest.

“Dave is an outstanding announcer, and I’m very excited to hear him take on a much larger role on our radio broadcasts this season,” said Jason Wolfe, Entercom Boston Vice President of AM Programming. “When we hired Dave a year ago, I knew that he would make an immediate impact in this marketplace and he’s done that and more. I’m looking forward to working with him for many years to come. He drew rave reviews from Red Sox fans during his first year, and with the additions of Dale and Jon, I’m excited to get the baseball season going.”

Wolfe continued, “I’ve worked with Dale Arnold for nearly 20 years. His professional play by play resume is lengthy, having spent 11 years with the Bruins and 4 with the Patriots. He is a truly professional announcer and will do an excellent job, and Jon Rish is one of our young stars. His addition as host of the pre and post game shows has made a significant difference in the quality of our overall broadcast. I’m very happy to give him this opportunity.”

Arnold said on his WEEI show today that he’ll be going with the team to Japan for the season opener over there, as well as for the first two games of the season in Oakland.

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