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Walker threw two scoreless innings out of the bullpen in Thursday's win over the Marlins, allowing one hit and two walks while striking out three to earn a hold.

Walker piggybacked Walker Buehler -- who started the game with five scoreless frames -- as the Phillies prepare and align their pitching staff for the postseason after clinching a first-round bye Wednesday. A longtime starter in the majors, Walker has taken well to relief work, posting a 3.32 ERA and 1.11 WHIP in 19 innings out of the bullpen this season compared to a 4.25 ERA and 1.45 WHIP as a starter.

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