Overview

• Campbell’s batting average plunged from .301 in April to .134 in May and .205 in June, dropping his OPS+ to 87.
• His defensive metrics rank him in the lowest percentile, with a minus-9 outs above average and seven errors at second base.
• The 22-year-old infielder signed an eight-year, $60 million extension this spring but now returns to Worcester for more development.
• The move coincides with Wilyer Abreu completing a rehab assignment and reentering the major-league roster.
• Other young contributors Carlos Narváez, Roman Anthony and Marcelo Mayer remain key lineup regulars for Boston.