Among other things, wide receiver Antonio Brown became the first player in NFL history to catch at least 125 passes in consecutive campaigns when he hauled in 136 balls in the 2015 regular season.
It's been that type of season for Brown and for the Steelers.
Following is a recap of some of 2015's most significant statistical achievements:
The best photos of WR Antonio Brown from the 2015 season.
Brown - Became the first player in Steelers' history to achieve at least 1,700 yards from scrimmage (1,862) in back-to-back seasons, tied for the league lead with 136 receptions and led the NFL with 2,074 combined yards (rushing, receiving, returns).
Brown and RB Le'Veon Bell - Became the first tandem in NFL history to amass 300 and 200 yards from scrimmage in the same game when Brown had a franchise-record 306 and Williams had 225 on Nov. 8 against Oakland.
Williams - Tied the Steelers' single-game record with three rushing touchdowns on Sept. 20 against San Francisco and tied for the NFL lead with 11 rushing TDs on the season.
TE Ben Roethlisberger - Became the first tight end in Steelers' history with back-to-back 60-catch seasons (60 in 2015) and joined WR Hines Ward as the only players in Steelers' history with eight consecutive 500-yards receiving seasons (535 in 2015).
QB Ben Roethlisberger - Led the NFL in passing yards per game (328.2), became the first player in Steelers' history and the fifth active player with 40,000 career passing yards (42,995) and set an NFL record for passing yards by a quarterback who did not start a game when he threw for 379 on Nov. 15 against Cleveland.
Roethlisberger also became the seventh player in NFL history to pass for at least 3,000 yards (3,938) in nine consecutive seasons (Brett Favre 18, Peyton Manning 13, Drew Brees 11, Eli Manning 10, Philip Rivers 10, Dan Marino 9).
CB William Gay - Returned an interception for a touchdown on Dec. 13 at Cincinnati and set an NFL record with five consecutive INTs returned for scores.
K Chris Boswell - Set Steelers' records for rookie/first-year kickers for points in a season (113), for percent of field goals made (90.6) and for most field goals made (29).
P Jordan Berry - Set a Steelers' record by landing 47.5 percent of his punts inside the opponents' 20-yard line and tied a Steelers' record with a net punting average of 39.1 yards per attempt.
LB William Gay - Set a Steelers' record with 18 career multi-sack games (since the stat became official in 1982) with three on Dec. 6 against Indianapolis.
Offense - Scored at least 30 points in a franchise-record six consecutive games, tied an NFL record by gaining at least 450 yards in four games in a row and set an NFL record for two-point conversions in a season (eight, in 11 attempts).
Mike Tomlin - Tied Dennis Green (92) for the fourth-most regular-season wins by an NFL head coach in his first nine seasons (George Seifert 106, Mike McCarthy 94, John Madden 92).
Steelers - Went 6-2 at Heinz Field and improved to an NFL-best 256-99-1 in home games (.721) since 1970.
Steeler Nation - A crowd of 67,234 showed up on Dec. 20 against Denver, the largest regular-season home gathering in Steelers' history.
Photos of Steelers Nation Unite members enjoying game day experiences as part of the team's 'Thank You Fans' game during Week 15 of the 2015 season.