Chris Ledlum had 12 points and eight rebounds for the Crimson (6-4), who have won four in a row at home.
Harvard shot 58% from the floor and had 15 assists on 32 made baskets.
UMass shot 33% and had more offensive rebounds (15) than defensive rebounds (12). The Minutemen had only five assists on 19 made field goals.
UMass plays at home against Yale on Wednesday. Harvard plays at George Washington on Saturday.
For more AP college basketball coverage: https://apnews.com/Collegebasketball and http://twitter.com/AP-Top25
This was generated by Automated Insights, http://www.automatedinsights.com/ap, using data from STATS LLC, https://www.stats.com
Ford's career-high 19 points paces Wisconsin over Purdue
Aleem Ford scored a career-high 19 points on Tuesday as Wisconsin held off a late charge from Purdue to win 69-65.
Florida beats Arkansas 73-59, extends dominance in series
Keyontae Johnson scored a career-high 24 points, Andrew Nembhard added 17 and Florida beat Arkansas 73-59 on Tuesday night for their 11th victory in the last 12 meetings.
Bowden's late free throws clinch Vols' 65-61 win over Vandy
Jordan Bowden scored 17 points and clinched a victory by sinking two free throws with five seconds left as Tennessee outlasted Vanderbilt 65-61 on Tuesday night.