Simplify the following text for a Grade 9 native English-speaking person.
Original: After graduation , Carroll tried out for the Honolulu Hawaiians of the World Football League at their training camp in Riverside but did not make the team due to shoulder problems combined with his small size for the position .
Simplified: After graduation , Carroll tried out for the Honolulu Hawaiians of the World Football League , but did not make the team because of shoulder problems .