No. 17 Texas Christian 56, Grambling State 0: Casey Pachall was 9 for 9 passing with three touchdowns in the first half before getting the rest of the night off as the Horned Frogs opened their first season in the Big 12 with a rout of the visiting Tigers.

Texas Christian outgained Grambling State 330-31 in the first half - including 201-12 passing - and 531-70 for the game.

The Horned Frogs led 42-0 at intermission en route to extending the nation's longest winning streak to nine games and making Gary Patterson the winningest coach in TCU history. He is 110-30 in 12-plus seasons.

Josh Boyce had four catches for 102 yards - all in the first half, including touchdown catches of 66 and 12 yards in the second quarter as the Horned Frogs scored on their first four offensive possessions.

Pachall, who threw for a school record 2,921 yards last season, had 201 on Saturday before turning the reins over to Trevone Boykin. The freshman was 8 of 8 passing with a touchdown pass and had a 34-yard TD run in the third quarter as TCU set a FBS record by completing 17 of 17 passes.

Grambling State (0-2) did not advance past its 41-yard line and its longest drive was eight plays for 24 yards.

Waymon James' 1-yard touchdown run was sandwiched by Deante' Gray's 70-yard punt return for a TD and Elisha Olabode's 28-yard interception return for a score. Pachall's 21-yard touchdown pass to Brandon Carter gave TCU a 28-0 lead after one quarter.

The Tigers' Dawrence Roberts, the preseason Southwestern Athletic Conference Offensive Player of the Year, was held to 9 yards on seven carries. Roberts, who rushed for 98 yards in the first half of Grambling State's 22-21 loss to Alcorn State last week before leaving with leg cramps, rushed for 1,102 yards in 2011.

GAME NOTEBOOK: Texas Christian WR Skye Dawson did not play after being suspended for violating school policy. ... Horned Frogs DT Stansly Maponga, who was 24th in the nation with nine sacks last season, had one Saturday. ... TCU is 78-2 under Patterson when holding opponents to 17 or less points. ... Gray added a 61-yard punt return in the fourth quarter to set a school record with 160 punt return yards. ... Dutch Meyer was 109-79-13 as TCU coach from 1934-52 and won national championships in 1935 and 1938.