By TERESA M. WALKER
AP Pro Football Writer
NASHVILLE, Tenn. (AP) - Marcus Mariota turned in a clean performance in his home debut, Tennessee cornerback Perrish Cox returned an interception 24 yards for a touchdown and the Titans beat St. Louis 27-14 on Sunday night to spoil Rams coach Jeff Fisher's return to town.
A week after Mariota was sacked, threw an interception and lost a fumble that was returned for a touchdown, the No. 2 pick overall out of Oregon was 5 of 8 for 58 yards with no turnovers.
Titans teammate Dexter McCluster dropped Mariota's pass in the end zone, while Rams safety Mark Barron couldn't hold a would-be interception off the rookie.
Tennessee's defense looked much improved against an offense that ranked 28th in the NFL last year. With Cox's interception, the Titans (1-1) finally stopped an opponent on the opening drive for the first time in six preseason games.
Nick Foles had a rough outing in three series for the Rams (0-2).
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