HOUSTON — Houston Texans running back Arian Foster was a late scratch last week and his absence due to a hamstring injury was felt in a loss to the New York Giants.

Foster said on Monday he would be “day to day” leading up to Sunday’s game against Buffalo.

“As soon as I feel 100 percent, I’ll be out there,” said Foster, who reached triple digits in Texans’ wins against Washington and Oakland. “It’s my hamstring’s call.

“I’ve played through a lot in this league — knees, shoulders, broken bones — but hamstrings are the hardest thing to gauge because you don’t know how it’s going to fatigue or react to a certain cut.”

Foster sat out the preseason and started the regular season with 241 yards on a league-high 55 carries.

“It’s frustrating watching your team play without you,” he said. “I’ve put a lot into (getting ready for) this season. It’s hard to stomach when all your people aren’t out there, but it’s part of the game.”

Foster was replaced by rookie Alfred Blue, whose 13 rushes for 78 yards included a 46-yard scamper that set up one of the Texans’ two touchdowns.

“I thought he played well,” Foster said. “It was his first start, on the road, and he made some big plays. He has a good future in this league. I was proud of him.”

Foster, 28, played in eight games last season and was nicked up during the preseason.