"When Blues camp began, Allen was the odd man out in net, but it didn't affect his attitude. After nine NHL wins and all-rookie honors in 2012-13, he was destined for the AHL because Jaroslav Halak and Brian Elliott had a year left on their contracts. Allen maturely accepted his assignment and turned in another stellar AHL season. He is as athletic as they come, possesses outstanding side-to-side ability and continues to work on closing his holes." (Jeremy Rutherford, The Hockey News Future Watch 2014, p. 43)

• Selected by St. Louis Blues in second round (34th overall) of National Hockey League entry draft, June 21, 2008.
• Signed as restricted free agent to two-year contract with Blues, July 25, 2013. The first year is a two-way contract ($750k NHL, $125k AHL), and the second year is a one-way contract ($850,000).
• Re-signed as restricted free agent to two-year, $4.7 million contract with Blues, July 3, 2015.
• Agreed to four-year contract extension with Blues, July 1, 2016.
• Traded by Blues (with seventh-round selection in 2022 NHL entry draft) to Montreal Canadiens in exchange for third-round selection in 2020 NHL entry draft and seventh-round selection in 2020 NHL entry draft, September 2, 2020.
• Signed to two-year, $5.75 million contract extension with Canadiens, October 14, 2020.
• Signed to two-year, $7.7 million contact extension with Canadiens, October 1, 2022.

• Member of silver-medal winning Canada, IIHF World U20 Championships, 2009-10.
• Played for Western Conference in American Hockey League All-Star Game, January 31, 2011.
• Member of Stanley Cup champion St. Louis Blues, June 12, 2019.

• Jake made his National Hockey League debut on April 30, 2012, at the Scottrade Center in St. Louis. What's more, Jake is one of the few players to make his National Hockey League debut in the Stanley Cup playoffs. With Jaroslav Halak injured, Allen was backing up Brian Elliott in Game Two of the Blues' Western Conference Semifinal series against Los Angeles. With the Kings leading, 5-2, late in the third period, St. Louis coach Ken Hitchcock inserted Allen in order to give his team some much-needed rest. Allen played 67 seconds, without facing a shot, before being replaced by Elliott. Ultimately, the manouevure failed, as the Blues fell by the same 5-2 score.

• Left game with injury, January 8, 2016. A few minutes after a collision with Anaheim's Corey Perry early in the second period, Allen was removed and replaced by Brian Elliott for the remainder of the game.
• Left game with undisclosed injury, April 3, 2016. Allen completed the first period of St. Louis' 5-1 win in Colorado, but appeared to be in discomfort heading into the intermission. Brian Elliott was not on the road trip, so Anders Nilsson finished the game for the Blues.
• Left game with lower-body injury, September 8, 2016. In the first period of a Blues' preseason game, Allen was slow to get up after a collision with a teammate. Carter Hutton replaced Allen to start the second period.
• Left game under concussion protocol, December 29, 2017. At 41:21 in St. Louis' 4-2 loss to Dallas, Allen collided with teammate Colton Parayko and was replaced by Carter Hutton. Allen returned at 50:55, yielding the final two Dallas goals.
• Left game with undisclosed injury, October 27, 2018. At 18:59 of the second period in St. Louis' 7-4 win over Chicago, Allen was run into by teammate Zach Sanford and Chicago's Brandon Saad on a drive to the net. He stayed on the ice for a few moments before leaving in favor of Chad Johnson.
• Left game with injury, January 12, 2022. With 2:49 remaining in the first period of Montreal's 5-1 loss at Boston, Samuel Montembeault replaced Allen in the Canadiens net.
• Left game with head injury, November 13, 2021. Late in the first period of Montreal's game at Detroit, the Red Wings' Dylan Larkin was shoved by Montreal defenseman Jeff Petry and crashed into Allen, sending the goaltender's helmet flying and knocking the net off. Allen stayed in the net initially until the next whistle, where was removed by the league's concussion spotter. Samuel Montembeault entered the game with 48 seconds left in the first period, and Allen did not return to the bench.
• Left game with lower body injury, April 9, 2022. Allen left Montreal's game at Toronto 13:32 into the first period immediately after Maple Leafs forward Auston Matthews scored the first goal of the game, a backhand rebound from Mark Giordano's initial shot over Allen's outstretched left pad. Samuel Montembeault finished the game for the Canadiens.

• Left game for new skate blade, December 5, 2017. Carter Hutton subbed in for Allen between 30:31 and 33:58 of St. Louis' 4-3 win in Montreal.

• On October 28, 2021, Jake had a 45-save shutout for the Montreal Canadiens in a 4-0 win at San Jose.
• On March 26, 2022, Jake stopped 49 Toronto Maple Leafs in a 4-2 Montreal victory. The Canadiens scored four times on just eighteen shots.