He is the designated hitter on Wednesday, and it is not yet known when Bautista will return to the field.
Heathcott is currently on the 60-day disabled list with an injured quad.
The moves were made in order to make room on the roster for the incoming David DeJesus and David Murphy, both of which were acquired via trades earlier this week.
Navarro hit .260 with five RBI in 77 at-bats with the Angels this season. Robertson was hitting .346 with nine hits over his last eight games before being demoted.
The team was hopeful he could return to the lineup for the game, but the soreness prevails. Trout said he didn't anticipate going on the disabled list and that "the treatment I had [Tuesday] made a big difference."
When he does come back, he will do so a 9-for-16 roll with three homers over his last four games.
Betts sustained a concussion trying to make a catch in the Tuesday night game. His DL stint will only be seven days.
His loss is a blow to Boston. Betts owns a .265/.317/.438 slash line and has scored 52 runs this season.
Holt has a slash line of .286/.369/.348 through 320 plate appearances in Triple-A this year.
"He brings a ton of energy, and he's done a real good job at Triple-A," Indians manager Terry Francona said.
Holt is in Cleveland's lineup on Wednesday, hitting out of the ninth spot.
Cowgill has taken batting practice a number of times before, but has felt discomfort the following day on each occasion.
Springer, though, is staying active by participating in cardio work, which includes tossing balls to coaches who hit ground balls during batting practice.
“Chasing down some fly balls, doing anything he can to avoid being stir crazy,” manager A.J. Hinch said. “He’s not doing anything really with his right hand.”
Buxton will continue to take batting practice this week and then progress to participating in on-field pregame drills. If he has no set backs, Buxton could begin a rehab assignment as early as next week.
Hunter has remained productive in compiling a slash line of .254/.308/.439 and 54 RBI in 89 games. He has two home runs and five RBI in the last four contests.