Houston Texans wide receiver DeAndre Hopkins won the NFL's Offensive Rookie of the Month in September after posting 20 receptions and a league-high 270 yards receiving among all rookies.
His seven receptions for 117 yards receiving against Tennessee remains a career-high (after four games), but it was the three-yard touchdown game-winning touchdown that beat the Titans in overtime that earned him recognition for being the first rookie since Santonio Holmes to record an overtime touchdown (yes, THAT touchdown on New Years Eve in '06). So he had a good September.
Two Bengals were nominated for the award; running back Giovani Bernard and tight end Tyler Eifert. Bernard led all NFL rookies with 147 yards rushing and two rushing touchdowns, along with 12 catches, 122 yards receiving and another score. One could argue for Bernard, scoring more touchdowns and generating more yards from scrimmage. We're a little biased.
Eifert finished the month with 12 receptions for 159 yards receiving.