[2] He transferred to California State University, Northridge and lettered for the Matadors from 1990 to 1991 as a defensive lineman.
[2] After going undrafted in the 1992 NFL draft, Sila played in all 10 games for the Sacramento Attack of the Arena Football League (AFL) in 1992, recording 11 solo tackles, one assisted tackle, eight sacks, one forced fumble, one pass breakup, and three blocked kicks, earning first-team All-Arena honors as an offensive lineman/defensive lineman.
[5] He played in nine games for the Hooters during the 1993 season, totaling three solo tackles, two sacks, one pass breakup, and four blocked kicks.
[1][3] While with the Attack/Hooters, Sila was a member of an informal group of Polynesian players on the team called "The Committee", which included Niu Sale, George Fua, Richard Ane, Junior Ili, Ken Sale, and Kaiser Noa at several points in time.
[7][6] Sila appeared in four games for the AFL's San Jose SaberCats in 1995, accumulating one assisted tackle and three pass breakups.