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PHILADELPHIA (AP) — Knuckleballer Matt Waldron was recalled from Triple-A El Paso on Sunday by the San Diego Padres, who placed left-hander Adrian Morejon on the 15-day injured list because of right knee inflammation.

Left-hander Ryan Weathers was returned to El Paso after serving as the 27th man in Saturday’s doubleheader and taking the loss in a 9-4 defeat in the second game against Philadelphia.

Waldron, a 26-year-old right-hander is 1-6 with a 7.02 ERA in 12 starts and two relief appearances for El Paso. He has one career start with the Padres, taking the loss as he allowed two runs and four hits over 4 2/3 innings in a 2-0 defeat to Washington on June 24.

San Diego Padres' Fernando Tatis Jr. is hit by a pitch from Philadelphia Phillies' Yunior Marte during the seventh inning of the first baseball game in a doubleheader, Saturday, July 15, 2023, in Philadelphia. (AP Photo/Matt Slocum)

San Diego Padres right fielder Fernando Tatis Jr. left the second game of a Saturday doubleheader against the Philadelphia Phillies in the sixth inning with an ankle injury.

Philadelphia Phillies' Bryce Harper hits a home run against San Diego Padres pitcher Ryan Weathers during the fourth inning of the second baseball game in a doubleheader, Saturday, July 15, 2023, in Philadelphia. (AP Photo/Matt Slocum)

Bryce Harper ended the longest homerless streak of his major league career in the second game, and the Philadelphia Phillies swept a doubleheader from the San Diego Padres 6-4 and 9-4.

San Diego Padres' Manny Machado hits a home run against Philadelphia Phillies relief pitcher Jeff Hoffman during the sixth inning of a baseball game, Friday, July 14, 2023, in Philadelphia. (AP Photo/Matt Slocum)

Manny Machado, Juan Soto and Fernando Tatis Jr. homered, Yu Darvish struck out nine in six sharp innings and the San Diego Padres defeated the Philadelphia Phillies 8-3 in a rematch of last year’s National League Championship Series.

Chicago Cubs' Christopher Morel hits a home run against the Cleveland Guardians during the eighth inning of a baseball game game, Sunday, July 2, 2023, in Chicago. (AP Photo/David Banks)

The Chicago Cubs will be at Texas in the only interleague matchup on Major League Baseball’s traditional opening day on March 28 in the second season of the balanced schedule.

Weathers is 1-6 with a 6.25 ERA.

Morejon has a 7.00 ERA in one start and seven relief appearances.