NHL-NHLPA CBA negotiations, Laich stated in support of the National Hockey League Players' Association (NHLPA) that, "At some point you have to dig your heels in and fight. If we don't this time, then what happens next? Appeasement only makes the aggressor more aggressive, and the players really understand that. We believe in our cause and our leadership and I believe we're more unified this time and ready for a fight." Prior to the start of the lockout-shortened 2012-2013 playing season, Laich played for the Kloten Flyers of Switzerland's National League. In 35 games for the Flyers, Laich posted 17 goals and a total of 38 points. He also reportedly suffered a groin injury, which limited his play upon his return stateside with the NHL. When play resumed for the 2012–13 season, Laich was limited to nine games. On March 17, 2014, the Capitals announced via Twitter that Laich "underwent a successful procedure to release a tight adductor," a part of the groin muscle. He is expected to miss the rest of the season with a recovery time of four-to-six weeks. Except for a minor shoulder injury resulting in him missing 16 games, Laich returned to full health in 2014-15. He finished with seven goals and 20 points in 66 games played. In the 2015–16 season, Laich's offensive production rapidly declined, while his $4.5 million cap hit stuck out as one of the only adverse aspects of a league-leading Capitals squad. On February 27, 2016, the Capitals placed Laich on waivers for the purpose of sending him to the Hershey Bears of the AHL. The following day, on the eve of the trade deadline, Laich, along with Connor Carrick and a second round selection (Carl Grundström) in the 2016 draft, were traded to the Toronto Maple Leafs, his boyhood team, in exchange for Daniel Winnik and a fifth round pick (Beck Malenstyn) in the 2016 draft. The purpose of the trade was to give the Capitals salary cap relief to use toward younger core player contracts that needed re-signing the following off-season. Capitals GM Brian Maclellan called the trade, when asked, the hardest thing he had done as General Manager of the team. Laich had been the longest tenured active professional Washington-area athlete at the time of the trade, concluding his career of 12 years with the franchise. In what easily stands as the most emotional trade in Capitals history