Triston Casas had a big day at the plate, clubbing his first home run of the spring while helping key a big seventh-inning rally as the Red Sox surged past the New York Yankees 9-4 on Wednesday afternoon.

Casas’ homer was a solo shot in the top of the fourth off Yankees starter Carlos Rodon, a 421-foot bomb to deep right center field that tied the score at 1-1. Then in the seventh, after Dalton Guthrie tied the game at 4-4 with an RBI single, Casas drew a walk on eight pitches to load the bases, setting the stage for Tyler McDonough’s go-ahead two-run double.

All told the Red Sox scored five runs in the seventh, all of which were charged to former Red Sox minor leaguer Oddanier Mosqueda.

Making his third start of the spring, Nick Pivetta had a rocky showing against a Yankees lineup composed largely of big league regulars. The right-hander allowed three runs over three innings, allowing four hits and a walk with three strikeouts while throwing 37 of his 62 pitches for strikes.

Pivetta allowed an RBI single to Anthony Rizzo in the bottom of the first and then allowed two straight baserunners to start the fourth, after which he was pulled with no outs. Joely Rodriguez then allowed both of Pivetta’s inherited runners to score on an Anthony Volpe two-run double, and in the bottom of the fifth Rodriguez also served up a solo home run to Gleyber Torres.

Two bright spots for the Red Sox pitching staff were Justin Hagenman and Greg Weissert, both recently acquired in trades who have been excellent so far this spring.

With his scoreless sixth inning on Wednesday, Hagenman — who was acquired in last summer’s Kiké Hernández deal — has now enjoyed six consecutive scoreless outings to start the spring, striking out seven while allowing only one walk and three hits over 5.2 innings. Weissert, one of the pitchers acquired in the Alex Verdugo trade, also threw a scoreless inning and has now allowed only one run through his first 5.2 innings this spring.

Verdugo, meanwhile, went 0 for 3 in his first game against his old team. He is currently batting .190 with a .530 OPS on the spring.