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A Maryland man named Jacob Landis has been riding his bike to all 30 MLB ballparks this summer for a good cause. He is raising money for children with hearing loss who are otherwise unable to afford a special implant. On Saturday night, Landis was stuck by a tractor trailer according to an ABC News report.

"Yesterday, with less than four miles to go to the hotel, I was struck by a tractor trailer's mirror," said Landis in a statement on Sunday. "I don't remember anything that happened, until I woke up at the hospital."

A witness said Landis was struck by the mirror of a semi in rural Florida. The truck did not stop and investigators believe the driver may not have even known about the accident. Landis suffered a severe concussion, a broken nose, two small cheekbone fractures and a chipped tooth. His cousin has accompanied him on the trip.

The 24-year-old Annapolis native has been riding his bike since April 3 and has already visited 29 of the 30 MLB parks. Landis been advised not to ride his bike following the accident, but he still plans on attending his final scheduled game Tuesday night, when the Phillies visit the Marlins.

"I just want to thank everyone for their kind words through my Facebook account and special thanks to all of my supporters who made this ride possible," added Landis.

Landis was born with normal hearing but was deaf by age 10. He received a special implant that allowed his hearing to be fully functional. His goal was to raise $1 million with the summer-long bike ride.

You can learn about Landis' ride and charity at his Jacob's Ride Facebook page.