Gonzalez was called up from Triple-A El Paso on Tuesday.

Gonzalez will replace Jackson Merrill (hamstring) on the 26-man roster after Merrill was placed on the 10-day injured list Tuesday with a right hamstring strain. Gonzalez has produced a .290 average with three home runs, seven RBI, seven runs scored and a stolen base over 31 at-bats in seven games with El Paso so far this season. The 27-year-old will provide San Diego with another depth option in the outfield with Merrill unavailable.

Mountcastle isn't in the lineup Tuesday against Arizona.

Mountcastle will get a chance to catch his breath Tuesday after going 6-for-12 with two RBI and three runs scored across his last three games. Ryan O'Hearn will fill in as the Orioles' first baseman while Adley Rutschman serves as the DH, giving Gary Sanchez a start behind the plate.

The Padres placed Merrill on the 10-day injured list Tuesday with a right hamstring strain.

Merrill's hamstring has kept him out of the lineup since Monday, and he hasn't been recovering as quickly as the team would like. In an effort to prioritize his long-term health, the Padres will now send the young outfielder to the injured list to give him ample time to recover and ensure his hamstring doesn't remain an issue for the rest of the season. Oscar Gonzalez was recalled from Triple-A El Paso in a corresponding move.

Iglesias is starting in left field and batting seventh against the Athletics on Tuesday.

Iglesias has never started in the outfield during his professional career, so Tuesday will be a first for the 35-year-old. With three of the Padres' possible left fielders on the bench because a lefty is on the mound and Brandon Lockridge starting in center due to Jackson Merrill's hamstring injury, the door has opened for Iglesias to head to left field.

Heyward is not in the Padres' lineup against the Athletics on Tuesday.

Heyward has recorded one hit in his last eight at-bats and will get to rest on Tuesday with lefty Jeffrey Springs in the mound for the Athletics. Jose Iglesias has the start in left field and is batting seventh.

Sheets is not in the Padres' lineup against the Athletics on Tuesday.

Sheets will begin the game on the bench with the Athletics sending southpaw Jeffrey Springs to the mound. Yuli Gurriel will start at first base and Luis Arraez will bat as the designated hitter Tuesday.

The Twins transferred Lee's (back) rehab assignment to Triple-A St. Paul, and he's starting at second base and batting second in Tuesday's game, Aaron Gleeman of The Athletic reports.

The 24-year-old will move his rehab assignment to the highest level of the minors after going 0-for-3 with two strikeouts in his one appearance with Single-A Fort Myers. Lee played seven innings defensively in that game and will likely need to play a few full games in the field before being cleared to join the Twins.

Diaz is not in the Padres' lineup against the Athletics on Tuesday.

Since Diaz's last day off April 2, he has gone 2-for-13 with two walks in four games. The two hits came in the same game Saturday as he went hitless in the other three. Martin Maldonado is the starting catcher Tuesday and is batting ninth.

Merill (hamstring) is not in the Padres' lineup against the Athletics on Tuesday.

Merill will miss his second straight game as he continues tending to his hamstring. This comes as an expected precaution, but if he misses any more games it would exceed what his expected time off is. Like Monday, Brandon Lockridge has the start in center field.

Valdez (illness) is starting Tuesday's game against the Mariners, Chandler Rome of The Athletic reports.

The left-hander was dealing with some fatigue and a sore throat over the weekend, but he's ready to take his regular turn through the rotation Tuesday. Valdez delivered seven scoreless frames in his season debut but surrendered five runs over five innings during his previous start last Wednesday.