(AP) — Philip Rivers' sharp throw found Antonio Gates in the middle of the end zone, and StubHub Center shook with cheers from fans who were thrilled to see this familiar teamwork in a brand-new setting. Rivers threw a 5-yard scoring pass to Gates on the opening drive of the Chargers' first preseason game since relocation, but the Seahawks' backups otherwise dominated a 48-17 victory Sunday night. The team moved 111 miles north into a stadium built for soccer, yet providing an undeniably intimate NFL experience for fans. The Chargers' revamped defense clearly has work to do under new coordinator Gus Bradley after giving up 459 yards to the Seahawks, whose reserves mostly got off to a stellar start. Russell Wilson led the Seahawks to a field goal in his only drive with Seattle's first-team offense. The smallest stadium in the NFL has exceptional sight lines and remarkable closeness to the field — and the Chargers Cannon is really loud when the home team scores. "From a player's perspective, you want to have that home-field advantage type of feel," said LaDainian Tomlinson, the Chargers Hall of Famer and a special assistant to owner Dean Spanos. Defensive lineman Michael Bennett remained seated on the Seahawks' bench with a towel on his head during the national anthem.