Dan Greenberg covers the Boston Celtics for Barstool Sports. Twitter: @StoolGreenie   2:02 Marcus Smart vs Terry Roizer   6:00 Smart as a defensive unicorn   17:38 Rozier’s advantage over Smart   22:10 Early reaction to Greg Monroe    Available for download on iTunes and Stitcher on Sunday, February 4. Celtics Beat is powered by eHarmony.    Learn more about your ad choices. Visit megaphone.fm/adchoices