In the regular season, the Bills defense forced 30 turnovers against its opponents. The Buffalo unit continued its succe s at taking away the ball in the playoffs.Sean McDermott's defense wasted no time getting after the ball in its wild-card matchup against the Steelers on Monday afternoon. The Bills forced a fumble early in the first half and picked off Pittsburgh quarterback Mason Rudolph in the end zone in the second quarter.However, it appeared as though the Bills may have been robbed of a second fumble recovery. Late in the first quarter, Steelers tight end Pat Freiermuth lost po se Ebuka Izundu Jersey sion and it appeared that the Bills recovered the pigskin, giving the offense the opportunity to build on its lead.Instead, the call on the field was that the ball went out of bounds. Even after a challenge by McDermott, the officials went to the replay and upheld the call on the field, leaving the Buffalo faithful irate, and many questioning why the fumble was not called.MORE:Here is more on why Freiermuth's fumble was called back.Why was Pat Freiermuth's fumble not called?On the first play of a drive late in the first quarter, Rudolph found Freiermuth for a short completion. However, the tight end took off, gaining extra yards after the completion for Pittsburgh.As he was being tackled along the sidelines by Christian Benford, the ball was jarred out of his hands. The Bills defense wasted no time jumping on the loose pigskin, with Baylon Spector immediately jumping on the ball.THATS A FUMBLE!!! Jimmy Randazzo (@JimmyRandazzo) While it appeared as though it was going to be the Bills' ball, the Anthony Mack Jersey play was ruled to be a Steelers fumble that went out of bounds, so Pittsburgh would maintain po se sion. Buffalo challenged the ruling on the field, and the officials went to a video review.Although the ball never went out of bounds, the call on the field stood, as announced by crew chief Carl Cheffers. He did not provide any sort of explanation of the play.A po sible explanation is that it appeared that the ball may have hit Freiermuth's helmet as his body was out of bounds. If that was the case, then the ball would have been ruled out of bounds before the Bills maintained po se sion.That was enough video evidence for the officiating crew to uphold the call. However, it may also have stood had it been called a Frank Gore Jersey fumble on the field as well.The failed challenge was consequential, as it resulted in the Bills losing all of their challenges for the rest of the day. The team previously had a succe sful challenge on a George Pickens fumble earlier in the game.Was this a catch and a fumble by George Pickens? Action Network (@ActionNetworkHQ) How many challenges are allowed in the NFL?Both teams in an NFL game start with two challenges. Those are the only two challenges that teams get for the duration of the game unle s a team wins both of their challenges.In the case of a succe sful challenge, the call on the field is overturned Dominic Proctor Jersey and are charged for one challenge.In the case of a failed challenge, the team loses a timeout.If a team succe sfully challenges a call, but loses out on a second challenge later, then the club has no more challenges for the remainder of the contest.MORE:If a team uses two challenges and succe sfullywins both, then they are allowed one finalchallenge.A team can only use achallenge if they Andre Johnson Jersey have at least one timeout remaining, and cannot challenge a play if they have no timeouts remaining.The coach must throw a challenge flag before the start of the next play. Once the next play is underway, a coach can no longer challenge.Inside of two minutes at the end of a half, plays cannot be challenged, and all reviews will be initiated by the officials.If a coach challenges but has no timeouts, then the team is a se sed a 15-yard penalty.All replay reviews in overtime will be initiated by the replay official.Challenges left from regulation do not roll over into overtime.