Houston Texans running back Arian Foster said he is day to day with the hamstring injury that prevented him from playing in Sunday's loss to the New York Giants. Foster, who had a league-leading 55 carries over the first two weeks of the season, acknowledged Monday that he is uncertain if he will be able to return for Houston's Week 4 game against the Buffalo Bills. Read more http://espn.go.com/nfl/story/_/id/11573850/arian-foster-houston-texans-says-day-day-hamstring-injury