It’s rare in life that you can look back and identify the specific moment that marked the end of the way things were and the beginning of the way things are. That is not the case when it comes to the creation of the style of play that dominates the modern NBA, which now sees teams eschewing size advantages in favor of loading the floor with as much shooting as possible. It’s worth examining the origins of the small-ball revolution, even if there are indications that the trend may reverse itself — perhaps as soon as this season.Though the seeds for this shift were planted by teams like the Houston Rockets of the mid-1990s, the Phoenix Suns of the 2000s and, particularly, the 2009 Orlando Magic, everything changed for good on May 13, 2012. During the Miami Heat’s 95-86 win over the Indiana Pacers in Game 1 of the 2012 Eastern Conference semifinals, Heat star Chris Bosh suffered an abdominal strain and was ruled out indefinitely.To that point in both the regular season and the playoffs, the 6-foot-11 Bosh had played almost exclusively at power forward. He’d played 2,174 minutes combined regular season and postseason minutes, spending 1,901 of them (87.4 percent) next to one of Joel Anthony, Udonis Haslem, Ronny Turiaf, Dexter Pittman or Eddy Curry in the frontcourt.1All lineup statistics come from NBA Advanced Stats, unless otherwise noted. With Bosh sidelined for the remainder of that Pacers series and the first four games of the ensuing Eastern Conference Finals against the Boston Celtics, however, Heat coach Erik Spoelstra slid the 6-foot-8 Shane Battier into the starting lineup in his place.Battier had played just 3 percent of his regular-season minutes at power forward in 2011-12, per Basketball-Reference, but he remained in the role for the rest of Miami’s run to the 2012 title. Bosh returned at first as a reserve. But when he moved back into the starting lineup for Game 2 of the NBA Finals, it was as a center next to Battier and LeBron James in the frontcourt. With that group providing more space in which James and Dwyane Wade could operate, the Heat blitzed the Oklahoma City Thunder with four straight wins, capturing the first of two championships of the Big Three era.After the Heat rode the same configuration to another championship in 2013, the NBA saw a massive drop in two-big lineup usage the following season. That trend may have steadily continued anyway, but it was hastened by the Golden State Warriors going even smaller, playing the 6-foot-7 Draymond Green at center in order to beat LeBron’s Cleveland Cavaliers teams. Pretty soon, damn near the whole league was reorienting around trying to compete with the Warriors’ Death Lineup.Consider the following chart, which plots regular-season “two-big” lineup usage for each of the NBA’s 30 teams, as well as the league average, from the beginning of the Heat’s Big Three era through the just-completed 2018-19 campaign. See if you can identify the turning point; it should be pretty easy.2For purposes of this analysis, we are identifying a “big” as a player who is either a) listed as a center; or b) listed as a power forward and measures at least 6-foot-8 and attempted less than one three-pointer per 36 minutes during the regular season. Such a definition allows us to see which teams played a non-shooting forward (or another center) next to their center in the frontcourt. Two-big lineup usage peaked at 58.8 percent of minutes leaguewide during the 2011-12 season, but the shift to small ball sliced that number in half within four seasons. Last season, two-big lineups played just 6.4 percent of regular-season minutes. During LeBron, Wade and Bosh’s second season together, 19 of the league’s 30 teams used two-big lineups at least 50 percent of the time. Last season, no team even crossed the 40 percent mark in two-big lineup minutes.Such a stark trend might make it seem like we have reached a point of no return. But given several developments of this offseason’s free-agent period, it seems fair to wonder whether we may have actually passed Peak Small Ball and might be in for a reversal during the 2019-20 campaign.The Philadelphia 76ers, for example, signed Celtics center Al Horford to a four-year deal, and presumably plan to play him as their primary power forward alongside Joel Embiid. Contrary to popular belief, the 6-foot-10 Horford has actually been a center for the majority of his career — he’s played 83 percent of his minutes at the position, per Basketball-Reference — but Celtics general manager Danny Ainge has said that he believes a desire to return to the power forward slot — where Horford played in college — factored into his decision.Assuming Ainge is correct, Horford is not the only big who’s moved to a new team hoping to slide back to the four. New Los Angeles Lakers star Anthony Davis expressed a firm desire to resume playing the four during his introductory press conference. According to Basketball-Reference, Davis has spent 55 percent of his career at center, peaking last season at 96 percent.Other teams’ offseason moves indicate they could potentially lean into two-big lineups as well.The Sacramento Kings signed centers Dewayne Dedmon and Richaun Holmes, who could potentially play either together or alongside Harry Giles. The Portland Trail Blazers let small-ball power forward Al-Farouq Aminu leave in free agency and traded combo forward Moe Harkless, at the same time adding former Heat center Hassan Whiteside to last season’s primary starter Jusuf Nurkić,3In fairness, Nurkić suffered a serious injury at the end of last season and figures to miss a significant portion of 2019–20. and they seemingly plan to start former backup center Zach Collins at power forward.The New York Knicks have Mitchell Robinson as their presumed starting center and should probably let 2018 lottery pick Kevin Knox play at least some of his minutes at power forward; but they still used a significant portion of their free-agent budget to sign non-shooting power forward Taj Gibson, as well as Bobby Portis, who in a 28-game stint with the Wizards last season played 77 percent of his minutes at center. Even the team’s most high-profile signing, Julius Randle, only started shooting threes last season, and he often gets treated by opposing defenses as a non-shooting big man.The Indiana Pacers let power forward Thaddeus Young and small forward Bojan Bogdanovic leave in free agency, and plan to start backup center Domantas Sabonis at power forward next to Myles Turner, who has been the starting center since midway through his rookie season. Sabonis has played 79 percent of his minutes at center with the Pacers, per Basketball-Reference, but he was primarily a power forward both in college and during his rookie season with the Thunder. The Utah Jazz — previously among the heavier users of two-big looks — pivoted smaller by signing the aforementioned Bogdanovic, but in so doing sent Derrick Favors to the New Orleans Pelicans, where he could potentially play alongside either Jaxson Hayes or Jahlil Okafor when he’s not manning the pivot next to Zion Williamson.Several additional teams may end up using two-big lineups more often due to other types of roster changes. The defending champion Toronto Raptors, after losing Kawhi Leonard to the L.A. Clippers, could use more of the Marc Gasol-Serge Ibaka frontcourt that worked so well for them in the playoffs. The Clippers figure to load-manage Leonard, as the Raptors did last season, but even when he’s in the lineup, it’s entirely possible we see Montrezl Harrell — who has played 83 percent of his career minutes at center, including 96 percent last season — playing the four next to Ivica Zubac. Even the Warriors — who took small-ball even further than the Big Three-era Heat — could end up using more two-big lineups featuring, say, Kevon Looney and free-agent signee Willie Cauley-Stein when Draymond Green has to rest, given that they lost Kevin Durant in free agency and traded away Andre Iguodala.Already, that’s a significant portion of the league seemingly preparing to devote non-trivial minutes to two-big lineups. Not even mentioned are four of the seven squads that used two-big units at least 10 percent of the time last season, and could conceivably do so again. (They are the Minnesota Timberwolves, Cleveland Cavaliers, San Antonio Spurs and Denver Nuggets, in addition to the Trail Blazers, Jazz and Pacers.) With multiple contenders in the East and West seemingly planning to use two-big lineups more often, it doesn’t appear as necessary for teams to ensure that they are well-equipped to go small against the very best opponents. Much of the league appears to have reacted by returning to the comfort of using size as an advantage.