As Little League season gets underway, experts are warning parents about a recent uptick in baseball-related injuries that have been appearing in younger and younger athletes.

Former Olympic softball player and current ESPN correspondent Jessica Mendoza spoke to one 13-year-old athlete and to sports medicine experts for “Good Morning America,” and found that the number of baseball-related injuries have increased as more young players compete in the sport year-round.

Experts said they are now seeing an increase in some of the more severe overuse injuries in younger patients, including a sharp increase in the number of young athletes requiring a reconstructive elbow surgery commonly known as Tommy John surgery.