Escobar suffered the injury when he was hit by a pitch during a game on Sept. 10 against the Orioles. He has missed six consecutive games, including Sunday's finale with the Yankees, and there is no immediate timetable for his return.
"The swelling came back a little bit more yesterday," Blue Jays manager John Farrell said on Sunday morning. "He had another follow-up X-ray, there was no structural issues there. He's banged up."
The Blue Jays originally expected Escobar to miss just a couple of games but the injury hasn't healed as hoped. The native of Cuba has been put through the appropriate tests and the elbow didn't respond favorably, which has kept him away from on-field activity.
"The range-of-motion exercises and maintenance that he's going through are passive," Farrell said. "We're dealing with something that is legit here. It's not that he's not wanting to get back on the field, or not wanting to go through the work to get there, it's just that he's restricted right now."
Farrell all but ruled out the possibility of top prospect Adeiny Hechavarria being promoted to the Major Leagues in Escobar's absence. Hechavarria hasn't played since his Triple-A Las Vegas club had its season come to an end on Sept. 5.
Hechavarria would need three to five days of baseball-related activities before being able to return. He will head to the Arizona Fall League later this year, but is not considered a serious candidate for a promotion because of the lack of recent activity.
Infielder Jonathan Diaz is one candidate who could be called up from Double-A New Hampshire. The Fisher Cats ended their season on Saturday by winning the Eastern League championship, and the utility man could receive the promotion if Escobar's injury does not improve.
For now, the Blue Jays can take solace in the fact that Escobar does not appear to have a major injury, and the club remains optimistic the elbow will improve even though there is less than two weeks remaining in the season.
"It's clearly the fluid that's in there because the MRI has not shown structural damage, the follow-up X-rays have not shown any cracks or fractures of any kind," Farrell said. "He's just dealing with a legitimate issue right here."
Escobar is batting .290 with 11 home runs and 48 RBIs in 133 games this season.