Patriots coach Bill Belichick has reached into his sock six times for his challenge flag, the most recent coming in the third quarter of Sunday's 34-14 loss to the Browns.
Belichick challenged whether Browns quarterback Colt McCoy had broken the plane of the goal-line on a 16-yard scramble for a touchdown. The ruling on the field stood.
Since going 2 for 2 in his first two challenges of the season (both against the Ravens), Belichick is now 0 for his last 4.
The Patriots' six challenges rank tied for second in the NFL. Only the Seahawks and Jets have more, with seven apiece.
According to ESPN Stats & Information tracking, there have been 145 challenge situations across the NFL through the first nine weeks of the season, with 85 decisions upheld and 60 overturned.
The Patriots' 33 percent success rate in overturning calls is below the league average of 41.4 percent.