Last Sunday, he completed 20 of 29 passes for 288 yards with four touchdowns and one interception in the Colts' 28-25 victory over the Jacksonville Jaguars.
It is the 16th AFC weekly player honor of his career after his first four-touchdown game this season.
Romo completed 19 of 30 passes for 309 yards with four touchdowns and one interception in the Cowboys' 37-27 win over Green Bay.
Tatupu recorded a team-high 11 tackles and a career-best three interceptions in the Seahawks' 28-24 win at Philadelphia, and Allison returned three kickoffs for 143 yards, including the longest play in franchise history (103 yards) in the Vikings' 42-10 win against Detroit.
2014: The Year in Music [PHOTOS]