The 24-year-old joined Luton in March after a spell in the USA but failed to make a single first-team appearance.
"I think he only played one-and-a-half reserve games and didn't train that much and I don't think it was fair for us to have a good look at him," said Brabin.
"I think he probably wanted a bit more commitment and we would have liked to have seen a bit more from him.
"At the moment we've got four quality strikers and we're looking forward to working with them.
Town have strengthened their options with the signings of striker Danny Crow, full-back Dan Gleeson, winger Andy Drury and goalkeeper Kevin Pilkington, but Brabin expects tough competition in the Blue Square Bet Premier.
"I don't want to start naming names but when you're involved with football you know what's going on and I think there'll be a few surprises this year," he said.
"There's a couple of clubs that are going to be very ambitious this year and they'll be tempting players with financial backing.
"I think it's going to be an even tougher league than last season."
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