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In 1967, Earle was chosen from relative obscurity to become WSBK-TV's announcer for Boston Bruins games. He called Bruins games during one of the club's most successful periods, which included winning the 1970 Stanley Cup Finals. Due to the team's success and the high number of games aired on WSBK, Earle became a high-profile sportscaster in Boston, however, according to Jack Craig of The Boston Globe, he was also the most criticized. In 1971, Earle was loudly booed by Bruins fans while presenting Channel 38's 7th Player Award. He was let go by WSBK-TV at the end of the season. From 1971 to 1977, Earle served as a second play by play announcer/analyst with the Philadelphia Flyers on WTAF alongside Gene Hart.