J.J. Watt donated $10,000 on Thursday to a GoFundMe page created for the family Mitchell Lundgaard, the Appleton firefighter who was killed in a shooting.

Lundgaard, a 14-year veteran of the Appleton Fire Department, was shot Wednesday after responding to the downtown transit center for a medical emergency. The incident also left a police officer and bystander wounded and the suspected gunman dead.

Lundgaard had a wife and three children, according to the GoFundMe page. A visitation will be held from 3 to 6 p.m. Monday at Appleton Alliance Church, 2693 Grand Chute Blvd.

Watt is a former University of Wisconsin defensive end and Wisconsin native who plays in the NFL for the Houston Texans. His donation is one of more than 800 made in the first 13 hours since the page was created.

Neither Watt nor his charitable foundation has publicly commented about the donation.

Watt, whose father is a retired firefighter, has a history of making similar donations. He also gave $10,000 to the family of Cory Barr, the fire captain who was killed in an explosion in Sun Prairie in July 2018.

Watt also helped raised more than $37 million for people affected by Hurricane Harvey and donated $10,000 to a Texas student who was injured in a football game.

Lundgaard’s GoFundMe page has raised more than $115,000 of its $250,000 goal.

Donations can also be mailed or brought in person to 700 N. Drew St., Appleton, WI 54911. Anyone who wishes to send condolences or sympathy cards for Lundgaard's family can mail them to the same address on Drew Street.