49ers' Trent Williams Won't 'Put an Expiration Date' on NFL Career amid 15th Season

San Francisco 49ers star offensive tackle Trent Williams isn't contemplating retirement just yet.

"I don't think I'm going to put an expiration date on it," Williams said Tuesday during an appearance on The Rich Eisen Show. "I think I'm going to just enjoy this process, enjoy the ability to wake up and live a dream, enjoy the ability to get out and play this child's game for king's ransom. I don't want to think about the end. I just want to enjoy every minute of it."

At 35, Williams is certainly on the back end of his career, though he remains one of the best offensive tackles in football. Last season he earned his 11th Pro Bowl bid and his third straight first-team All-Pro selection despite missing two games.

And the desire to be great continues to motivate him.

"I'm from Texas, born and raised—Longview, Texas," he told Eisen. "I'm groomed to play football. I've been playing football since the second grade. It's pretty much all I know. And I'm just chasing that perfection. I just want to be the perfect player. I just want to be the best offensive lineman to ever play the game. That fire is just still burning inside. So, as long as it's burning, I'm going to be playing."

He also wanted to be compensated as such this offseason, as he was one of two high-profile holdouts—alongside Brandon Aiyuk—throughout training camp. The Niners and Williams ultimately agreed to a restructured three-year, $82.6 million deal, which included a $25.6 million signing bonus and $48 million in total guarantees.

San Francisco has gotten off to a slow start, going 2-2 while beset by injuries to a number of key players, including superstar running back Christian McCaffrey. That certainly hasn't sapped the joy from Williams, however, who noted he could potentially play another five years in the league (though acknowledged he may decide after another two years or so that he's done).

"At this point, I don't even see the reason in looking towards the end," he told Eisen. "I'm 15 years in, and I know I don't have another 10 left, but I'm definitely not going to put a cap on it."