Zgonina played 17 seasons in the NFL and spent more time with the
St. Louis Rams than with any other team, which included a
Super Bowl title in the
1999 season (
XXXIV). His best season, however, came with the
Miami Dolphins in
2004, when he recorded 63 tackles and five sacks. He spent two seasons with the Steelers, recording 27 tackles in 21 game appearances before being waived after the
1994 season. He was claimed off waivers by the
Carolina Panthers on August 29, 1995, and he recorded two tackles in two game appearance for the Panthers in
1995. He signed with the
Atlanta Falcons in
1996, and made one sack, one fumble recovery, and 12 tackles in the eight games he played. Zgonina signed a two-year contract with the
St. Louis Rams on March 12, 1997. He played in 15 games in 1997, producing two sacks and 21 tackles. He was released by the Rams on August 21, 1998. Zgonina was signed by the
Oakland Raiders on October 14, 1998, but was released six days later. before playing in a game for the Raiders. He signed with the
Indianapolis Colts later in the season and played in two games. Zgonina re-signed with the Rams on March 27, 1999. He spent four seasons with the Rams, becoming their starting defensive tackle during the
2000 season. He earned a Super Bowl ring in 2000 after St. Louis beat the
Tennessee Titans in Super Bowl XXXIV. He was also a member of the 2001 NFC Champion Rams, starting 13 games and playing in
Super Bowl XXXVI. He recorded 144 tackles, 10.5 sacks, three forced fumbles, and six fumble recoveries in his second tenure with the Rams. Zgonina signed a four-year contract with the
Miami Dolphins on April 1, 2003. In his four-year career with the Dolphins, he made 178 tackles, 10 sacks, an interception, and two fumble recoveries in 62 games (22
starts). He signed with the
Houston Texans on March 14, 2007, He had 64 tackles, 2.5 sacks, and two fumble recoveries in his three-year tenure, including playing in all 48 games with five starts. ==Coaching career==