The win kept the sixth-ranked Flyers (22-2, 11-0) alone in first place in the Atlantic 10 and dropped the second-place Rams (18-6, 10-2) two games back in the standings.
"Thought Jalen had a really good game,” Dayton coach Anthony Grant said. “He’s a really good player — if you haven't heard me say that before. Hopefully you guys start to believe me."
Crutcher overshadowed Rhode Island guard Fatts Russell, who entered the game leading the Atlantic 10 in scoring but struggled to get much going until some in the sellout crowd had started heading for the exits.
Crutcher had 15 of his points in the first half when he was 4 for 5 from the floor and made all five of his free-throw attempts.
"Jalen's never lacked confidence,” Grant said. “Jalen walked in here as a 17-, 18-year-old freshman and got a starting position that he earned. He went through the league and held his own against some really, really talented guys so you know this is not something that to me is an epiphany or new. He's matured, he's older, but he's been a really good player for a really long time guys."
Russell had two points on 1-for-6 shooting in the first half. He scored 13 points in the last eight minutes to finish with 19, one below his league-leading average of 20.3 per game.
For the game, Crutcher was 5 of 7 from the floor and 9 for 9 from the charity stripe but said he wasn’t worried about how his number matched up against Russell’s.
"No, I just let the people outside talk,” he said. "I just try to play for my team. I just care about the win more than just individual."
Russell missed 11 of his 18 shots and had four assists.
Meanwhile Toppin notched his seventh double-double with 22 points and 10 rebounds.
He also had a highlight-reel dunk at the expense of his brother, Jacob, who raced in too late to stop a breakaway jam by the Flyers star.