As the USC Trojans and the rest of college football prepare for the fall, there are still questions for each team following their spring practices.  Fox Sports analyst Joel Klatt gave his take on what USC’s biggest question is and how it could impact the Trojans and coach Lincoln Riley in 2026. Nov 29, 2025; Los Angeles, California, USA; Southern California Trojans head coach Lincoln Riley leads the Spirit of Troy marching band in a rendition of Tribute to Troy after teh game against the UCLA Bruins at United Airlines Field at Los Angeles Memorial Coliseum. Mandatory Credit: Kirby Lee-Imagn Images | Kirby Lee-Imagn Images USC’s Biggest Question “The question for me is actually the defensive line. Is the defensive line ready? Let me take a deeper dive. During Lincoln’s tenure at USC, they are 132nd in the country in yards per carry allowed,” said Klatt on the Joel Klatt Show. An improvement up front is definitely something that the Trojans have to fix in a conference like the Big Ten.…