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What really happened between Jon Lester and Chris Bosio

After Lester's early exit from Thursday's game against the Cincinnati Reds, cameras caught the Cubs southpaw appearing to have a confrontation in the home dugout with Bosio, the team's pitching coach. CSN's David Kaplan did some investigating and said Friday on his morning radio show on ESPN 1000 that Lester was expressing frustration with the Cubs defense. It was not directed to Bosio.