Voters on NFL.com have made their choice. Running back Todd Gurley of the St. Louis Rams is the Week 4 2015 Pepsi NFL Rookie of the Week, the NFL announced today. Gurley rushed for 146 yards on just 19 carries in the Rams' victory over the Arizona Cardinals. Gurley was selected from five finalists through fan votes on NFL.com. The other Week 4 finalists included San…