Lincoln Riley is on record this spring — more than once — noting that the Trojans needed to add linemen (plural, on both sides of the ball) via the transfer portal, and yet thus far, they’ve swung and missed. On Friday, USC extended an offer to former Colorado Buffaloes offensive tackleIsaiah Jatta. The 6′-6″ 320 lbs. OT appeared in 11 games for Colorado during the 2023 season. Another intriguing aspect of the Trojans’ offer, Jatta is a San Diego native who attended Helix High School. Before joining Coach Prime’s program, he attended Snow College in Utah At Snow, Jatta was named a 2022 NJCAA F…