"My 2 teams are PITT n BAMA I will make my commitment on the 21st at my school #CENTRAL VALLEY," Foster tweeted Sunday.
Foster will play in the Under Armour All-American Bowl on January 4. Joining him from the WPIAL is four-star offensive tackle Dorian Johnson, who committed to Pitt two weeks ago.
In 2012, Foster rushed for 481 yards and 12 touchdowns, but did his most damage as a receiver catching 45 passes for 763 yards and 8 touchdowns. On defense, he finished with 67 tackles, 4 interceptions, 8 passes deflected and a fumble recovery. He averaged 27.8 yards a punt return and 29.4 yards a kickoff return on special teams.
Foster took his official visit to Pitt on November 17 along with Johnson and four-star prospect Tyler Boyd. He visited Alabama on October 27.