TORONTO — Cody Bellinger could return to game action soon.

Aaron Boone said that the left fielder, recovering from a Grade 2 left hamstring strain, is in line to start a rehab assignment sometime next week if things go according to plan. That continued to happen on Friday, as Bellinger went through full baseball activities before the Yankees’ series-opening, 3-1 loss to the Blue Jays.

‘I’m feeling really good,” Bellinger said three weeks removed from suffering his injury. “So I’m just kind of right on track of a normal strain. Today was a really good day, so I’m advancing very well.”

Bellinger did say that his hamstring is “definitely still tight,” but he ran at “pretty much full speed” on the turf at the Rogers Centre, an encouraging sign.

“It went way better than I expected,” he said. “I was doing a lot of defense with [outfield coach Luis Rojas] and breaking in, breaking back. First step was good. Bases went well, so defensively, it was my best day, just effort-wise.”

Bellinger, who was hitting .259 with a .770 OPS, 11 homers, 53 RBI and 10 stolen bases before getting hurt, also took batting practice on the field on Friday.

The former MVP said that he isn’t sure how many rehab games he will need before rejoining the Yankees. He mentioned “definitely” playing in one and assessing from there.

Asked if he expects to be activated before August ends, Bellinger replied, “I think that that would be very positive if I could do that.”

Sept. 1 is when rosters expand from 26 players to 28 players. And with Giancarlo Stanton (calf strains) and Aaron Judge (fractured rib) expected back after Bellinger, in that order, a potential roster crunch is coming (as well as some reinforcements for a lineup that is in desperate need).

The Yankees could always send Spencer Jones down when Bellinger comes back, though the rookie has held his own at the plate lately. After that, one of the extra September roster spots can go to Stanton. And if the Yankees avoid further injury before Judge comes back, utilityman Amed Rosario, a poor defender who hasn’t hit lefties like he’s supposed to, could become the odd man out.

RODÓN TBD

Boone said that Carlos Rodón looked good in his second rehab outing on Thursday, but he wasn’t ready to say if the lefty’s next start will be in the majors.

“He could do one more [rehab start],” the manager said after Rodón walked one and struck out seven over 4.1 scoreless innings and 58 pitches at Double-A on Thursday. “We haven’t made that decision yet.”

Asked why the Yankees wouldn’t activate Rodón after such a sharp outing, Boone replied, “It’s not something I want to go into here necessarily, but just trying to look at the schedule and how it lays out and what makes the most sense. There’s a lot of factors other than just [activating] him, which we might do. Obviously, he’s not fully built up yet, so we’re still kind of talking through that probably the next couple days.”

The Yankees have said all along that the plan is for Rodón to need a piggyback pitcher, someone who can provide length out of the bullpen, when he first returns to the majors. Yankees pitching coach Matt Blake recently acknowledged that back-of-the-rotation starters Ryan Weathers and Will Warren are the logical choices for that job, and that one of them could fill a more traditional bullpen role once Rodón is fully built up.

Weathers has outpitched Warren for an extended stretch, and Rodón and Warren both line up for start days on Tuesday.

CHIVILLI HURT

The Yankees, who didn’t acquire any relievers before the trade deadline, saw their bullpen depth take a hit on Friday, as they placed Angel Chivilli on the seven-day injured list at Triple-A. Boone said the righty has “some posterior elbow stuff going on.”

Chivilli, who has a 3.78 ERA over 15 big league games this season, will see a doctor this weekend.

The Yankees did add to their Triple-A bullpen on Friday, though, signing veteran right-hander Justin Topa to a minor league deal. The Binghamton, New York native had a rough 8.05 ERA over 19 innings for the Twins this season, but also a 57.4 groundball rate.