Siena's Jackson has high-ankle sprain
The Saints are 2-2 and are averaging 64 points per game in their second leading scorer's absence.
Jackson had a MRI on Monday and said from the locker room, following a 73-67 victory over Iona that it's a high-ankle sprain.
"I'm glad it's not a tear," Jackson said.
Jackson wasn't sure how long he would be out, but with the whole week off before the Western New York trip, he is "hoping" to be able to play this Friday night against Canisius.
"I have all week to get treatment," he said.
It's more likely that he could try to return on Jan. 14 against Marist.
"For the Buffalo trip, I don't know if he's going to be able to play," said Siena coach Mitch Buonaguro.