Jaromir Jagr posted a video Tuesday on social media of Gaudreau assisting on his 766th and final goal in the league when they were teammates with the Calgary Flames in 2018.
"It was a beautiful pass above all," Jagr wrote in Czech. "Unfortunately, life can be sometimes unbelievably cruel. Thank you, Johnny Gaudreau, that you were here and you gave hope to all those guys by your unbelievable performances that they can succeed at the world class level in the NHL as you managed to do. My sincerely condolences to your family. R.I.P. to you and your brother."
Donations also continued to pile up to support Matthew's widow, Madeline, who is pregnant with the couple's first child, due in December. A GoFundMe set up by Madeline's sister, Holland Korbitz, and verified by the online fundraising company had raised more than $590,000 as of Wednesday afternoon.
Dozens of current and former players from around the league, or their significant others, are listed among the more than 7,800 donors, including $3,000 from the family of New York Rangers forward Artemi Panarin and $2,013 from Matt Duchene of the Dallas Stars.
Cliff Rucker, owner of the ECHL's Worcester Railers HC for whom Matthew played two seasons from 2017-19, is listed as the top donor at $10,000.
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"Maddy, the entire Railers HC family stands shoulder to shoulder with you during this incomprehensibly difficult time for you and your loved ones," Rucker commented. "You and Matty will always be part of our Railer family, and I hope you can feel the love and support we are sending your way."
The Gaudreau brothers were cycling on a road in Oldmans Township on Thursday night when a man driving an SUV in the same direction attempted to pass two other vehicles and struck them from behind about 8 p.m., according to New Jersey State Police. They were pronounced dead at the scene.
Police said the driver, 43-year-old Sean M. Higgins, was suspected of being under the influence of alcohol and charged with two counts of death by auto, along with reckless driving, possession of an open container and consuming alcohol in a motor vehicle. On Tuesday, police said nothing more about the case, including Higgin's blood alcohol level, was being released at this time.
No information about a funeral or memorial services, public or private, was immediately available.
"As we embark on the journey of laying John and Matty to rest, we are greatly comforted by all those who have visited these growing memorials and who have left messages of love, prayers, thoughts of kindness as well as jerseys, skates, sticks, pucks, flowers, candles and so many other tokens of remembrance," uncle Jim Gaudreau posted on Facebook. "We are consoled by the memorials on each of your doorsteps, in your yards and on your cars. We have heard and seen the countless moments of silence and heartfelt messages by so many professional athletes, organizations and other athletic leagues, by every single person in private, along with the extremely heartfelt messages from broadcasts, media and each and every single one of you along with the random acts of kindness and compassion by complete strangers."
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Fans in Columbus on Friday made a memorial out of hockey sticks, flowers and other mementos outside the Blue Jackets' downtown arena. Flames fans in Calgary, Alberta, also paid tribute with messages and Gaudreau's No. 13 written in chalk on the ground outside the Saddledome.
The Blue Jackets said fans are invited to a candlelight vigil on Wednesday night outside Nationwide Arena, which will include brief remarks from members of the organization as well as 13 minutes, 21 seconds of silent remembrance for the jersey numbers worn by Johnny and Matthew.
The Blue Jackets said general manager Don Waddell and players will speak to reporters Wednesday afternoon.
The Blue Jackets will host a 13 minute and 21 second moment of silence on Wednesday night.
The Calgary Flames will also host a candlelight vigil a few hours later at the memorial outside the Scotiabank Saddledome. For those unable to attend in person, a live stream will be available on the Flames website, as well as other official social media channels.
Johnny wore number 13 with the Blue Jackets, Flames and at Boston College. Matthew wore number 21 at BC.
Wayne Gretzky over the weekend said he, wife Janet, and their family were devastated by the senseless tragedy.
"We are sending our love, thoughts and prayers to the Gaudreau family," Gretzky posted on social media. "We lost two great young men who were loved and a huge presence both on and off the ice. Johnny and Matthew, you will always be remembered and missed."
Their deaths on the eve of their sister Katie's wedding scheduled for Friday in Philadelphia transcended hockey. Play-by-play broadcaster Bob Wischusen offered somber words about Johnny and Matthew during ESPN's college football broadcast of the game Monday night between Florida State and Boston College, the school the Gaudreau brothers attended and played hockey together at for one season a decade ago.
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"The entire National Hockey League, as well as the Boston College community and so many others, were devastated Friday when we learned of the deaths of Johnny and Matthew Gaudreau," Wischusen said. "Our hearts are shattered, and we send every good thought and prayer to their wives, Johnny Gaudreau's young children, Matthew's child on the way and all of their family and friends."
WPVI and The Associated Press contributed to this post.