He played for the San Francisco Giants and Baltimore Orioles of Major League Baseball (MLB) and went to Louisiana State University.

As a senior, he was a first team All-State selection, won the Student-Athlete Award, and was named Catholic High Man of the Year.

He signed with the Giants and finished the 1999 season with the Salem-Keizer Volcanoes of the Class A Northwest League, where he started 10 games and accumulated a record of 3-3 and an ERA of 1.61.

He made a rehabilitation appearance with Fresno on June 15, but lasted just two innings; later in the month, doctors found that his shoulder blade was broken, an extremely unusual injury for a pitcher.

He was not activated from the disabled list until September 20, and he appeared in just three games for the Orioles in 2003, pitching 21⁄3 innings in relief and accumulating an 0–1 record with an 11.57 ERA.

He pitched only four innings for the Lynx before he went on the disabled list again with right elbow inflammation; he was out until mid-August, and he finished the season by making two rehab starts for the Orioles's short-season Class A club, the Aberdeen IronBirds.

[3] In 2009, Ainsworth and Lawrence sold their stake in Big Leagues of Baton Rouge and joined with former White House Press Secretary, Reed Dickens, to form Marucci Sports.

[7] The Associated Press calls the company "bat maker to the stars",[8] and Forbes Magazine highlighted it as one of the top growth brands in the country.