But it's not his first one, even though his 40-yard interception return against Florida briefly changed the momentum of the 2006 SEC Championship Game.
And Robinson doesn't consider his last touchdown the best of the bunch. Arkansas was losing so badly to fifth-ranked Texas last Saturday that he didn't feel like celebrating after returning a fumble 80 yards for a score.
If the Arkansas defensive end had to pick his favorite touchdown, he'd go with his 30-yard interception return in the fourth quarter of last season's 45-31 win over Mississippi State.
Because, unlike his three other defensive touchdowns, that one actually came in a win for the Razorbacks.
"The one I favor is the Mississippi State one. I couldn't believe it myself, but all the players were excited and I was excited," Robinson said. "And I was excited for helping the team come out with a victory."
Robinson's fumble return against Texas last Saturday was perhaps the lone bright spot for Arkansas' defense during the 52-10 route in Austin.
The Razorbacks didn't record a single sack, and the team hadn't scored a touchdown until the senior scooped up a fumble by Texas backup quarterback John Chiles and raced 80 yards for a touchdown with 2 minutes, 20 seconds left.
"I wasn't even winded. I just got subbed in, so I was fresh and I just outran everybody and cruised on into the end zone," Robinson said. "If we were up, you would have gotten a celebration out of me. But no celebration this time since we just got blown out."
What's made Robinson's four career touchdowns even more impressive is the fact that he's a 6-foot-2, 258-pound defensive end who hasn't been a consistent starter since his sophomore season in 2006.
His work ethic has been questioned at times, and he's still listed as the backup behind redshirt freshman Jake Bequette heading into Saturday's game against No. 12 Florida in Reynolds Razorback Stadium.
As odd as it might sound, though, Robinson is tied for fourth on the Razorbacks in scoring this season (6 points) thanks to his touchdown against Texas.
And the only Arkansas offensive players who have scored more touchdowns than him through the first four games are running back Michael Smith (three), quarterback Casey Dick (two) and tight end D.J. Williams (two).
"He does have a knack for being around the ball," Arkansas defensive ends coach Kirk Botkin said of Robinson. "And (he) does have a knack for making good things happen."
Robinson returned a fumble by former Kentucky quarterback Andre Woodson 16 yards for a touchdown in last season's 42-29 loss to the Wildcats in Fayetteville.
And Robinson said he scored his only defensive touchdown at Little Rock Central when he intercepted a screen pass and ran 65 yards, stopping only to celebrate in the end zone with his teammates.
"He's a good athlete," said Arkansas defensive tackles coach Bobby Allen, who as a member of Houston Nutt's staff saw all of Robinson's previous touchdowns. "He has good instincts when it comes to that kind of stuff."
Of course, Robinson wouldn't mind scoring a second touchdown against Florida on Saturday.
In the 2006 SEC Championship Game, Arkansas took a 21-17 lead when Robinson stepped in front of a shovel pass by Florida quarterback Chris Leak midway through the third quarter.
Robinson said the Gators had attempted the same play earlier in the game, so he knew what to expect when they tried it again. He returned the interception 40 yards for a score.
"I already knew it was coming," Robinson said. "So the first time they had run it, I told the back of my mind, ‘If they run it again, I'm going to pick the ball off.'"
The Razorbacks relinquished the lead less than five minutes later on a fumbled punt return by Reggie Fish, and Florida went on to capture the SEC championship with a 38-28 victory.
So does Robinson have any touchdown celebrations in store if he scores against Florida or anyone else this season?
"I have several in mind," Robinson said, smiling.
On The Run
Defensive end Antwain Robinson has scored four touchdowns over his four seasons at Arkansas, two coming on fumble returns and two on interceptions.
Here is a breakdown of the senior's four career touchdowns:
How He Scored Opponent Date Outcome
40-yard interception return Florida Dec. 2, 2006 38-28 L
16-yard fumble return Kentucky Sept. 22, 2007 42-29 L
30-yard interception return Miss. State Nov. 17, 2007 45-31 W
80-yard fumble return Texas Sept. 27 52-10 L
Robinson Has Knack For Being Scoring Threat
Hawgs Daily Top Stories
Hogs announce 2017-18 season openerArkansas has announced the date and opponent for its 2017-18 season opener.
Hawgs Daily9:06 AM
Ragnow picks up another preseason honorFrank Ragnow has picked up another preseason honor.
Hawgs DailyYesterday at 4:24 PM
Hogs offer another in-state linemanThe Razorbacks have offered another in-state lineman.
Hawgs DailyTuesday at 9:16 AM
Gatlin discusses Arkansas offerHawgsDaily caught up with Arkansas target Noah Gatlin to talk about his recent offer from the Hogs.
Hawgs DailyMonday at 1:56 PM