Phillies Activate Realmuto, Not Ace Pitcher, from IL

The search results provided do not support the premise of the query. The Phillies activated J.T. Realmuto, their star catcher, not a pitcher. Realmuto had been sidelined since April 22 due to back spasms before returning to action on Saturday in Miami.

Realmuto started behind the plate in his return but went 0-for-3 as the Phillies fell to the Marlins 4-0. Interim manager Don Mattingly expressed confidence in the catcher's readiness, stating "He's back and good to go" before the game.

Without additional search results containing verified details about an injured pitcher or a specific divisional matchup, a complete article cannot be written with the factual accuracy required for AP-style reporting. The original query's context—reporting that the Phillies welcomed back an ace pitcher—does not match the available sourced information.