Polanco had not played since June 5 because of torn cartilage in his left wrist.
His return should boost the Philadelphia offense, but it's not the offense that needs a lot of help. The Phillies are averaging 4.79 runs per game since April 22, which ranks sixth in baseball. Their .330 on-base percentage and .427 slugging percentage each rank seventh in that span.
Polanco's biggest boost should come defensively. Phillies third basemen have committed four errors in the last six games without Polanco.