The 1999 NFL season was the 80th regular season of the National Football League. The Cleveland Browns returned to the field for the first time since the 1995 season. Also, the Tennessee Oilers changed its name to Tennessee Titans, and the league retired the name "Oilers" – a first in league history.
The return of the Browns increased the number of teams to 31, the first time the league had played with an odd number of clubs since 1966. As a result, the NFL was forced to give at least one team a bye each week; Previously, barring extreme circumstances, a club never received a bye during the first two weeks or last seven weeks of the season. Under a new system, for ten weeks of the season (Week #1 to Week #2, and Week #10 to Week #17), one team was scheduled a bye; for seven weeks of the season (Week #3 to Week #9), three teams sat out. This format would continue for the next two seasons until the Houston Texans joined the NFL in 2002 and returned the league to an even number of teams.
The start of the 1999 NFL Season was pushed back one week and started the weekend after Labor Day, a change from the previous seasons. Due to the Y2K concerns, the NFL did not want to hold the opening round of the playoffs on Saturday January 1, 2000, and did not want teams traveling on that day. Week 17 games were held on January 2, 2000, and the opening round of the playoff would be scheduled for January 8–9. The bye week before the Super Bowl was removed to accommodate the one-week adjustment. The start of the season after Labor Day would become a regular fixture for future seasons, beginning in 2001.
The final spot in the NFC playoffs came down to an exciting final day of the season. With both the Green Bay Packers and Carolina Panthers at 7–8 and tied for the last spot in the playoffs with the Dallas Cowboys, and tied in other tiebreakers, the tie between them would be determined by best net point differential in conference games. Both the Packers and Panthers were playing at 1:00 PM Eastern on January 2, and both teams tried to outscore the other. The Packers beat the Arizona Cardinals 49–24, and the Panthers beat the New Orleans Saints 45–13. The Packers finished ahead of the Panthers by 11 points, but Dallas defeated the New York Giants later that night to claim the final playoff spot.
The St. Louis Rams, who had a losing record for each of the past nine seasons, surprised the entire league by defeating the Tennessee Titans in Super Bowl XXXIV. Taken from https://en.wikipedia.org/wiki/1999_NFL_season

Final Stats:

Team	Coach	Top QB	Top RB	Top WR	Kicker
Jacksonville Jaguars	Tom Coughlin	Mark Brunell	James Stewart	Jimmy Smith	Mike Hollis
St. Louis Rams	Dick Vermeil	Kurt Warner	Marshall Faulk	Isaac Bruce	Jeff Wilkins
Indianapolis Colts	Jim Mora	Peyton Manning	Edgerrin James	Marvin Harrison	Mike Vanderjagt
Tennessee Titans	Jeff Fisher	Steve McNair	Eddie George	Kevin Dyson	Al Del Greco
Buffalo Bills	Wade Phillips	Doug Flutie	Antowain Smith	Eric Moulds	Steve Christie
Tampa Bay Buccaneers	Tony Dungy	Trent Dilfer	Mike Alstott	Dave Moore	Martin Gramatica
Washington Redskins	Norv Turner	Brad Johnson	Stephen Davis	Michael Westbrook	Brett Conway
Minnesota Vikings	Dennis Green	Jeff George	Leroy Hoard	Cris Carter	Gary Anderson
Kansas City Chiefs	Gunther Cunningham	Elvis Grbac	Donnell Bennett	Tony Gonzalez	Pete Stoyanovich
Seattle Seahawks	Mike Holmgren	Jon Kitna	Ricky Watters	Derrick Mayes	Todd Peterson
Miami Dolphins	Jimmy Johnson	Dan Marino	J.J. Johnson	Oronde Gadsden	Olindo Mare
Carolina Panthers	George Seifert	Steve Beuerlein	Tim Biakabutuka	Patrick Jeffers	John Kasay
Oakland Raiders	Jon Gruden	Rich Gannon	Tyrone Wheatley	Rickey Dudley	Michael Husted
Green Bay Packers	Ray Rhodes	Brett Favre	Dorsey Levens	Antonio Freeman	Ryan Longwell
Dallas Cowboys	Chan Gailey	Troy Aikman	Emmitt Smith	David LaFleur	Richie Cunningham
Baltimore Ravens	Brian Billick	Tony Banks	Errict Rhett	Qadry Ismail	Matt Stover
Detroit Lions	Bobby Ross	Charlie Batch	Sedrick Irvin	Germane Crowell	Jason Hanson
New York Jets	Bill Parcells	Ray Lucas	Curtis Martin	Keyshawn Johnson	John Hall
New England Patriots	Pete Carroll	Drew Bledsoe	Terry Allen	Shawn Jefferson	Adam Vinatieri
San Diego Chargers	Mike Riley	Jim Harbaugh	Natrone Means	Jeff Graham	John Carney
New York Giants	Jim Fassel	Kent Graham	Joe Montgomery	Amani Toomer	Cary Blanchard
Pittsburgh Steelers	Bill Cowher	Mike Tomczak	Jerome Bettis	Hines Ward	Kris Brown
Denver Broncos	Mike Shanahan	Mike Shanahan	Olandis Gary	Ed McCaffrey	Jason Elam
Chicago Bears	Dick Jauron	Shane Matthews	Curtis Enis	Marcus Robinson	Chris Boniol
Arizona Cardinals	Vince Tobin	Jake Plummer	Mario Bates	Rob Moore	Chris Jacke
Atlanta Falcons	Dan Reeves	Chris Chandler	Bob Christian	Tim Dwight	Morten Andersen
Philadelphia Eagles	Andy Reid	Donovan McNabb	Duce Staley	Torrance Small	Norm Johnson
San Francisco 49ers	Steve Mariucci	Jeff Garcia	Charlie Garner	Jerry Rice	Wade Richey
Cincinnati Bengals	Bruce Coslet	Jeff Blake	Corey Dillon	Darnay Scott	Doug Pelfrey
New Orleans Saints	Mike Ditka	Billy Joe Tolliver	Billy Joe Tolliver	Keith Poole	Doug Brien
Cleveland Browns	Chris Palmer	Tim Couch	Terry Kirby	Kevin Johnson	Phil Dawson
Playoff Games
Week	Day	Date		Winner/tie		Loser/tie	PtsW	PtsL
WildCard	Sat	8-Jan	boxscore	Tennessee Titans		Buffalo Bills	22	16
WildCard	Sat	8-Jan	boxscore	Washington Redskins		Detroit Lions	27	13
WildCard	Sun	9-Jan	boxscore	Minnesota Vikings		Dallas Cowboys	27	10
WildCard	Sun	9-Jan	boxscore	Miami Dolphins	@	Seattle Seahawks	20	17
Division	Sat	15-Jan	boxscore	Jacksonville Jaguars		Miami Dolphins	62	7
Division	Sat	15-Jan	boxscore	Tampa Bay Buccaneers		Washington Redskins	14	13
Division	Sun	16-Jan	boxscore	St. Louis Rams		Minnesota Vikings	49	37
Division	Sun	16-Jan	boxscore	Tennessee Titans	@	Indianapolis Colts	19	16
ConfChamp	Sun	23-Jan	boxscore	St. Louis Rams		Tampa Bay Buccaneers	11	6
ConfChamp	Sun	23-Jan	boxscore	Tennessee Titans	@	Jacksonville Jaguars	33	14
SuperBowl	Sun	30-Jan	boxscore	St. Louis Rams	N	Tennessee Titans	23	16
Most Points per game: 32.9
St. Louis Rams
Fewest Points per game: 13.6
Jacksonville Jaguars