If the man organizing the league had such an issue with telemarketers I think the onus was on him to ensure that anyone calling him who was not a telemarketer was able to be identified as not a telemarketer. It's not on the OP to assume that the man hates telemarketers more than most people do, and uses profanity on the phone, and to introduce herself in such a way as to avoid that.
I think she did nothing wrong.
If the man didn't want people calling and asking for him, he could have:
1) not volunteered field calls about the team
2) given his number for the pamphlet but not his name, so that callers would be forced to start with "I'm calling about softball" instead of asking for his name
3) just supplied an email address/mailing address, not a phone number
4) given a fake name for the pamphlet so he'd know what they were calling about.
A guy I dated in college had to supply a phone number for an activity he was the director of. He lived in a fraternity with few phone lines and so much chaoes that men hardly ever got their phone messages. So instead, he gave his work number out. But he wanted to be able to know that they were calling about this activity instead of work, so he gave a fake name. He knew that anyone asking for this fake name was calling about the activity instead of work.