On Sunday against the Los Angeles Rams, Oliver may have proved his critics wrong. The veteran cornerback was everywhere on the football field, making game-changing plays and helping the 49ers to a 30-23 win.
Oliver finished with three tackles, four assists, a pass defensed, and an interception.
"Just kind of go get the ball in the air," Oliver said of the interception while speaking with team reporter Lindsey Pallares after the game. "I just saw it pop up and just reacted to it, tried to grab it as fast as I could."
Oliver also had this impressive run stop behind the line of scrimmage.
And let's not forget this stop on 3rd-and-5.
Oliver certainly had himself a fantastic game. It will be interesting to see how Pro Football Focus grades his overall performance in the contest.
"The biggest thing was just keep on fighting," Oliver said of the defense's outing and early struggles. "Obviously, the first half, those first few possessions didn't really go how we wanted. We felt like we'd given them too much, given them too many points. But just kind of keep on fighting, make the right adjustments, get out there, and just keep on ballin'."
Oliver's head coach probably envisioned this type of performance upon adding the cornerback to the 49ers roster.
"I thought he was a stud today," Kyle Shanahan said. "I got to watch the whole tape to get through all of it, but I know he made some huge plays. He drove them on an out-of-bounds route when we were in quarters, which was good. The 4th-and-1 was huge because that's a Tampa 2 look, which he's walked on the slot, and that's far away from the B gap, and he didn't hesitate, had a big-time tackle, and then him getting the pick.
"So especially with some of our DBs getting banged up throughout the game, those guys had to step it up because they were kind of all over the place, and he did a great job at that."
One of Oliver's teammates also praised the cornerback's efforts on the field against the Rams.
"Yeah, Isaiah, he had a huge game today," linebacker Fred Warner told reporters. "I think this was great for him and his confidence in this scheme. Isaiah, he's a great player. We signed him for a reason. Obviously, I guess you could talk about an adjustment [to learning a new scheme], but he's gotten better and better as his time has gone here. So I'm really happy for him and the performance that he had."
More San Francisco 49ers News
-
49ers' George Kittle on Rams adding Myles Garrett: 'We've got incredible players too'
San Francisco 49ers tight end George Kittle hopes to be on the field with his teammates for the Week 1 matchup against the Los Angeles Rams in Melbourne, Australia. The All-Pro is working his way back from the Achilles injury he suffered during last season's playoffs. If... -
NFL execs: 49ers could use in-season Mac Jones trade to bolster roster
The San Francisco 49ers never seriously entertained the idea of trading quarterback Mac Jones, especially after he stepped in for an injured Brock Purdy last season and helped keep the offense on track. However, with Jones entering the final year of his contract, 2026 could... -
49ers go in a different direction in 2025 NFL Draft do-over
The San Francisco 49ers used the No. 11 overall pick in the 2025 NFL Draft on defensive lineman Mykel Williams. While Williams flashed potential during his rookie season, his early development took a setback when he suffered a torn ACL, ending his campaign... -
49ers game manager? Alex Smith pushes back on Brock Purdy narrative
No matter what Brock Purdy accomplishes, there always seem to be critics ready to dismiss his success by claiming he's simply a product of the San Francisco 49ers' system. The "game manager" label has followed the 26-year-old quarterback throughout much of his NFL career. One...