Mordecai throws 3 more TDs, No. 21 SMU beats Tulane 55-26

SMU wide receiver Danny Gray (5) makes a catch over Tulane defensive back Lance Robinson (7) during the second half of an NCAA college football game in Dallas, Thursday, Oct. 21, 2021. (AP Photo/Michael Ainsworth)

Tulane quarterback Michael Pratt (7) looks for a receiver during the first half of the team's NCAA college football game against SMU in Dallas, Thursday, Oct. 21, 2021. (AP Photo/Michael Ainsworth)

SMU defensive end Turner Coxe, right, sacks Tulane quarterback Michael Pratt during the first half of an NCAA college football game in Dallas, Thursday, Oct. 21, 2021. (AP Photo/Michael Ainsworth)

SMU tight end Tommy McIntyre (86) runs after catching a touchdown pass in front of Tulane linebacker Kevin Henry (33) during the first half of an NCAA college football game in Dallas, Thursday, Oct. 21, 2021. (AP Photo/Michael Ainsworth)

SMU running back Tre Siggers (4) celebrates with quarterback Tanner Mordecai (8) after Mordecai scored a rushing touchdown against Tulane during the first half of an NCAA college football game in Dallas, Thursday, Oct. 21, 2021. (AP Photo/Michael Ainsworth)

DALLAS — Tanner Mordecai threw three touchdown passes to push his nation-leading total to 29, ran for another score and No. 21 SMU dominated the first half in a 55-26 victory over Tulane on Thursday night.