Tony La Russa will not return to managing the Chicago White Sox this season.

La Russa was expected to be out "indefinitely" to see heart specialists earlier this month.

At the time, the team said the 77-year-old's absence will be "pending the results of these evaluations."

Miguel Cairo has filled in as interim manager and will remain in that position the remainder of the season.

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Tony La Russa thinks

Chicago White Sox manager Tony La Russa looks to the field from the dugout before the team's game against the Texas Rangers in Chicago June 10, 2022.  (AP Photo/Nam Y. Huh)

The White Sox won the AL Central last year but followed up with a disappointing 63-65 record with La Russa through 128 games this year.

When Cairo took over, the Sox went on a run, winning 13 of 19 games. The Sox are now in the midst of a five-game losing streak.

Tony La Russa in the dugout

Chicago White Sox manager Tony La Russa smiles before a game against the Boston Red Sox at Guaranteed Rate Field. (Kamil Krzaczynski/USA Today Sports)

La Russa is the league's oldest manager and is under contract through next season. But some fans have questioned his decision-making all season.

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In June, he made the decision to intentionally walk Trea Turner despite Turner being behind 1-2 in a count.

The following week chants of "Fire Tony" rang throughout Guaranteed Rate Field.

Chicago White Sox Tony La Russa

Tony La Russa of the Chicago White Sox against the Minnesota Twins in the fourth inning of a game at Target Field April 23, 2022, in Minneapolis. (David Berding/Getty Images)

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Entering Saturday, the White Sox were 6 ½ games out of a wild-card spot and trailed the Cleveland Guardians by eight games in the AL Central.