Fletcher posted his 11th double-double this season for the Rockets (18-7, 10-2), who lead the Mid-American West. Toledo and East leader Buffalo (10-1) are the only MAC teams with fewer than five conference losses.
Darrian Ringo's basket with 14 minutes left gave the RedHawks (13-12, 6-6) their only second-half lead but Fletcher responded with a 3-point play less than a minute later. Leading by five with 45 seconds remaining, Fletcher missed a 3 but Luke Knapke got the rebound to keep possession and the Rockets made 7 of 8 free throws thereafter.
Jaelan Sanford added 15 points for Toledo.
Darrian Ringo scored 16 points and Logan McLane 15 for Miami, which made just 4 of 27 from the arc.
Top recruits are starting to take their official visits, meaning it's time to make some predictions about where they're leaning.
The cream of the crop of American high school basketball will congregate in Colorado Springs from Oct. 5-7, as USA Basketball unveils its newly expanded Junior National Team minicamp in collaboration with the NBA, NCAA and NBPA.
Missouri guard Cullen VanLeer is retiring from basketball after tearing his ACL in the Tigers' final regular-season game last season.