Salvador Perez drove in a career-high six runs on a pair of homers, including a grand slam, as the Kansas City Royals moved within a game of the first-place Cleveland Guardians in the American League Central with Monday's 9-4 victory that capped a doubleheader sweep.

The surging Royals, winners of nine of their last 12 games, won the opener by a 4-3 score on Bobby Witt Jr.'s tie-breaking solo homer in the eighth inning.

Kansas City trailed 3-0 early in the nightcap but battled back to take a 5-4 lead on Perez's first homer of the game, a solo blast off Cleveland starter Logan Allen in the fifth inning. The All-Star catcher put the contest out of reach an inning later with a grand slam off Tim Herrin that marked his 17th career multi-homer outing, tied with Hall of Famer George Brett for the most in Royals' history.

Perez, who went 3 for 3 in the opener, also knocked in a run with a third-inning groundout that plated Maikel Garcia, who led off with a single and took third on a double by Witt.

Garcia and MJ Melendez each had three hits for Kansas City in the second game, while Paul DeJong went 2 for 4 with a solo homer.

The scuffling Guardians lost for the eighth time in 11 games despite three doubles and an RBI from Jose Ramirez in the nightcap. Daniel Schneemann had two hits for Cleveland, including a solo homer.

Cleveland is now 0-8 in doubleheader games this season.

In the opener, Witt drove a pitch from reliever Hunter Gaddis into the left field seats to give the Royals a 4-3 edge in the top of the eighth inning. John Schreiber and Lucas Erceg protected the one-run lead from there, with Schreiber earning the win and Erceg recording his eighth save with a scoreless ninth.

The Royals had taken a 3-2 lead on Melendez's three-run homer in the fourth inning, but the Guardians pulled even when Ramirez doubled in the seventh and later scored on Josh Naylor's single.

Jansen makes history, plays for the Blue Jays and Red Sox in same game

Danny Jansen became the first player in MLB history to appear for both teams in the same game when the Toronto Blue Jays and Boston Red Sox completed a previously suspended contest.

Jansen was a member of the Blue Jays when a June 26 matchup with the Red Sox was suspended in the second inning due to rain. He was traded to Boston on July 27 and inserted into the Red Sox's lineup when the game resumed Monday to accomplish the unprecedented feat.

The catcher's old team got the better of his current one, however, as Toronto posted a 4-1 win in the suspended game before dealing the reeling Red Sox a 7-3 defeat in Monday's regularly scheduled contest.

George Springer homered in both games, including a three-run shot in the fifth inning that erased a 1-0 deficit for Toronto in the nightcap.

Springer followed a double by Leo Jimenez and a walk to Steward Berroa with an opposite-field blast off Brad Keller to give the Blue Jays a 3-1 lead. Toronto scored twice more in the fifth on an RBI single from Addison Barger and a run-scoring double by Ernie Clement.

The big inning helped Jose Berrios (13-9) win his fourth straight start after the Toronto hurler held the Red Sox to three runs - two earned - and struck out six over 7 2/3 effective innings. Brendon Little relieved Berrios and tossed 1 1/3 scoreless innings for his first major league save.

Toronto has now won five straight in addition to the suspended game, while Boston has dropped four in a row along with the makeup game and is now five games out of a play-off spot in the AL.

Jarren Duran also homered in both games for Boston. The All-Star outfielder accounted for the Red Sox's lone run in the suspended game with a solo homer, then went 3 for 4 with a two-run shot in the follow-up meeting.

Springer's solo homer off Nick Pivetta in the suspended game snapped a scoreless tie in the seventh inning, and the Blue Jays scored three more times in the eighth on Vladimir Guerrero Jr.'s two-run double and an RBI double from Barger.

Pivetta (4-5) took the loss despite striking out 10 in six innings. The Boston right-hander allowed three runs - two earned - and just four hits.

Harper's hit in 10th puts Phillies over Astros

Bryce Harper's run-scoring single off Josh Hader in the 10th inning lifted the Philadelphia Phillies to a 3-2 comeback win over the Houston Astros in the opener of a three-game interleague series between division leaders.

After Philadelphia center fielder Johan Rojas made a diving catch with a runner at third to keep the game at 2-2 in the top of the 10th, Harper stepped to the plate with runners at first and second in the bottom of the inning and sent a ground ball through the infield. Kyle Schwarber beat the throw home from Houston right fielder Ben Gamel to score the deciding run and give the National League East-leading Phillies their third straight win.

Philadelphia trailed 2-0 after four innings, but closed the gap on Brandon Marsh's solo homer in the fifth and tied it in the sixth when Harper doubled and later scored on a Nick Castellanos single.

The Astros had gone ahead with two runs in the fourth. Victor Caratini drew a walk against Philadelphia ace Zack Wheeler and Gamel followed with a single, and both runners came home when Shay Whitcomb delivered a two-out double to left.

That was the only rough inning for Wheeler, who permitted two runs and struck out six over six frames.

Ronel Blanco worked 5 2/3 innings for Houston and also surrendered two runs while striking out five.

The Astros lost for the fifth time in seven games and had their lead atop the AL West shrink to 3 1/2 games after the second-place Seattle Mariners recorded a 5-1 win over the Tampa Bay Rays on Monday.