Once a Georgetown commit, the 6-foot-10, 220-pound center parted ways with the Hoyas in late November. Since then he's taken two official visits and has cut his list of schools to a pair of Big East programs.
The plan is for Riley, a four-star prospect, to wait until his senior season concludes and then he'll make his final decision.
"I think a lot of people began to recruit him again after he decommitted and I think in both cases they are programs that have a need for a big guy next year, so there's an opportunity to play right away," Keener said.
"The Big East is a very good conference and he wanted to get away from home, but maybe not too far away where his family couldn't come and see him play, so with Syracuse and Marquette they are both within a drive."
When asked if he thought either school stood out, Keener responded, "Not really. I think they are different styles. Syracuse has had good success with Detroit kids and they play that zone, where as Marquette is more of an uptempto style of team. I think he feels he could adjust to either situation."
Riley has strung together an impressive season. He currently averages 10 points, 12 rebounds and six blocks per game.
"He's had a good year and we've had a good year," Keener said. "We have a very strong team and a well balanced team. Although he's not scoring a whole lot of points, he's been our rebounding leader and our defensive stalwart, holding down the middle of the court. I've been very, very pleased with his performance."
Riley and Detroit Country Day, who sits 19-1, will begin District play against Lahser on Monday.