PHOENIX -- Dodgers shortstop Corey Seager remains sidelined with what is now described as mild oblique tightness, but he said he is "not at all" worried about being ready for Opening Day.

"I actually progressed today doing core exercises," said Seager. "It doesn't affect me with the angle of turn [batting]. When I'm crouched over turning underneath and the backhand turn irritates it. That motion."

• Spring Training info

General manager Farhan Zaidi indicated that the slow pace of Seager's return has been more precautionary than a function of the severity of the injury, which occurred March 3 when Seager made an awkward throw on a double play. It initially was described as mid-back tightness and is still considered mild, manager Dave Roberts said.

Seager said he's never had an oblique injury and there is no timetable for his return. But he said he was more worried about a twisted knee suffered in Spring Training than he is this injury.

"Yeah, absolutely," he said, adding that he expects to catch up on at-bats by playing in Minor League games, as he did last spring. "There's no panic."

While oblique injuries can take weeks to heal, Roberts said that shouldn't be the case for Seager, because it did not happen while swinging a bat.

"He's progressing, but if there's a little something in there he feels as he goes through treatments and ramping exercise, that just tells us to pump the brakes," Roberts said. "There's no reason to put him in there yet. It's more tightness, kind of mild oblique-ish. Initially there wasn't too much pain and he didn't do it swinging and he's improved every day. I don't know when he's getting back in the lineup, but I know it's getting better."

Roberts said he wasn't concerned about Seager having enough time to be ready for Opening Day, and cited Seager missing nearly three weeks last Spring with the twisted knee, which didn't prevent him from starting the season and becoming a unanimous choice for National League Rookie of the Year.

"I don't think we're really in jeopardy of anything like that," Roberts said. "Even last year, he logged 10 at-bats a day on the other side. He's riding the bike and getting his legs under him. With Corey, there's still plenty of time."

Of all the Dodgers nursing injuries, Seager was the only one that did not participate in outdoor drills on Friday.

Other injury updates

• Roberts said Andre Ethier is dealing with a hip spasm, but he could return to game action on Sunday.

• Alvin Toles (hyperextended knee) was back on the field for workouts, but he isn't yet ready for games.

• Pedro Baez has resumed throwing after being idle for two weeks with a bruised thumb.

• O'Koyea Dickson was scratched from the lineup with glute tightness.