Giants center Shaun O'Hara practiced Friday for the second straight day and there is a chance the veteran lineman can return to the field for the home game against Detroit.
O'Hara has missed the past three games with an injured left ankle and injured Achilles tendon. Head coach Tom Coughlin said O'Hara's availability will be a game-time decision. He is listed as questionable.
The Giants might be without kicker Lawrence Tynes against the Lions. Coughlin said Tynes sprained his left (non-kicking) ankle in practice on Friday and had to leave the team's workout.
Tynes is questionable for Sunday, as is linebacker Keith Bulluck, who practiced on a limited basis on Friday and has missed the past two games with turf toe.
Bulluck said that he would have to play through pain to be on the field Sunday, but added that the majority of discomfort associated with the injury has subsided.
O'Hara's injury first occurred in training camp. He played in the Giants' first two games but said prior to the regular season that he would likely have to deal with pain associated with the injury throughout the season. He had a cortisone shot last week to temper the pain but has not tested the ankle by pushing off of it while engaging in a block.
Backup lineman Adam Koets has started at center in O'Hara's absence.
It's unclear who would replace Tynes. Coughlin said Tynes suffered a similar injury in training camp over the summer and was unable to kick for "a couple of days."
When asked if the Giants would need to find a free-agent replacement for Tynes prior to Sunday, the coach said, "I can't tell you what I don't know. ... We have to see what he does."
Rookie punter Matt Dodge was a kickoff specialist in college at East Carolina, so he could potentially take over the kickoff duties Sunday. But he hasn't kicked field goals since high school. The Giants have a deadline of 4 p.m. ET Saturday to add a player to the roster. They would have to make room by cutting a player currently on the 53-man roster.
In other injury news, defensive end Osi Umenyiora is probable for Sunday. He participated in the portion of practice open to the media on Friday but was limited on Thursday with swelling in his knee. Safety Kenny Phillips practiced on Friday after being limited on Thursday. He is probable.
Mathias Kiwanuka, who has missed the past two weeks with a bulging disk in his neck, was running outside while his teammates practiced inside. He is out for Sunday. Fullback Madison Hedgecock (hamstring), defensive back Brian Jackson (neck), running back D.J. Ware (groin) and receiver Victor Cruz all are listed as out for Sunday.
Ian Begley is a frequent contributor to ESPNNewYork.com.