INDIANAPOLIS (AP) - Andrew Luck’s first NFL throw was a 63-yard touchdown pass, and the rookie led Indianapolis to three first-half touchdown drives and a 38-3 victory over St. Louis in Sunday’s preseason opener.

For Colts fans, it was like a jolt from the past. Fourteen years earlier, Peyton Manning’s first NFL throw was a 48-yard TD pass to Marvin Harrison.

This time, Luck, under pressure, dumped off a short screen pass to Donald Brown, who darted up the field, then cut across and outran the Rams’ defense for the score.

Luck finished 10 of 16 for 188 yards with two TDs in 24 plays for Indy.

Sam Bradford, the No. 1 pick in 2010, was 7 of 9 for 57 yards in two series for the Rams.

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