Dallas Cowboys practice in
2010. Regarded as an undersized
defensive tackle, he dropped in the
2005 NFL draft until he was selected in the seventh round (224th overall pick) by the
Dallas Cowboys, who were looking to play him at
defensive end in their new
3–4 defense. Ratliff played his first
NFL game at Oakland (10/2) and shared a sack with
linebacker Scott Shanle. He made his first start the next week against the
Philadelphia Eagles (10/9) when the Cowboys opened in their
nickel package. He was placed on
injured reserve on November 1. In
2006, he played 15 games as part of the
defensive line rotation. His quickness and relentless drive allowed him to tie for the team lead with seven
quarterback pressures; made 10 tackles; four sacks (tied for third on the team); one pass breakup; and one forced fumble. He led the team in fumble recoveries, which tied for second in the
NFL. He became the starting
nose tackle following an injury to
Jason Ferguson early in the
2007 season and although he was seen as an undersized player for the position, he started to dominate opposing
offensive linemen. He was signed to a $20.5 million, five-year contract extension on December 14,
2007, to stay with the Cowboys through the
2012 season. The deal included an $8 million signing bonus. That year, he received the team's
Ed Block Courage Award recipient. In
2008, although he faced constant double teams, he had his best statistical year, recording career highs with 51 tackles (30 solo) and 7.5 sacks, receiving his first
Pro Bowl invitation and establishing him as one of the league's best
3–4 nose tackles. For his solid performance that season he was also named to the
Pro Football Writers Association's All-NFC Team. The next year, he was considered one of the dominant players in the league, earning
All-Pro honors, after registering 40 tackles (29 solo) and 6 sacks. He was ranked 75th by his fellow players on the
NFL Top 100 Players of 2011. By
2011 he signed a new contract extension worth $40 million to play through the 2017 season, but there were already worries that his size and style of play could shorten his career. Discussions about moving him to
defensive end never materialized, and his production and health started to decline. At the end of the season, he was selected to his fourth straight
Pro Bowl appearance. In
2012 he missed his first game in five years. He missed four games with a high ankle sprain and also suffered a groin injury that put him on the
injured reserve list. He finished the season with only 16 tackles. During his rehabilitation process, Ratliff relationship with the team's medical staff and even with owner
Jerry Jones became tense. After his trust towards the Cowboys organization deteriorated, he hired an independent physician and started to rehab on his own. The Cowboys still saw him as key player in the new
4–3 defense, even after assigning him to the
Physically Unable to Perform list at the start of the year. After missing all preseason and the first 6 games of the season, the team terminated his contract and placed him on the failed physical list from Reserve/PUP (
Physically Unable to Perform) on October 16,
2013. He finished his Cowboys career with 27 sacks, 16 passes defensed and 317 total tackles. An already acrimonious release escalated after Ratliff's agent (Mark Slough) held a conference call on October 16, where he publicly stated that it was a serious pelvic injury that would likely take at least a year to heal. On October 23, the controversy heated up when Ratliff was cleared medically to work out for other
NFL teams, only a week after being released. He made his Bears debut against the
Minnesota Vikings in week thirteen, recording a tackle in a 23–20 loss. He finished with 4 starts, 14.5 tackles (1 for loss) and 1.5 sacks. On March 5,
2014, he re-signed with the Bears on a two-year contract. His best game came in week seven against the
Miami Dolphins, recording a career-high 3.5 sacks in a game. He missed five games due to injuries, but was still considered the best player on the defense, finishing with 6.5 sacks (second on the team) and 33 quarterback pressures. Ratliff was suspended by the NFL for the first three weeks of the
2015 regular season for violating the league's Policy and Program for Substances of Abuse. The suspension was a result of an incident that occurred in 2013, where Ratliff was arrested on suspicion of drunk driving. ==NFL career statistics==