Arch Manning leads Texas into his bayou backyard for a key matchup with LSU

AUSTIN, Texas (AP) — Arch Manning is intimately familiar with Saturday nights in "Death Valley,” having been in the stands for some of LSU's biggest games in Tiger Stadium during his childhood in Louisiana.He was one of those kids playing pickup football, sometimes even dressed in purple and gold, amid the tents bustling with Tiger fans tail-gaiting over spreads of…