Celtics-Sixers, Stevens' extension, & leftover mailbag questions

The Celtics will face the Sixers in the first round, and Brad Stevens will coach that series with a fresh extension in his back pocket. MassLive's John Karalis has that and unanswered mailbag questions. Support Us By Supporting Our Sponsors! Helix RIGHT NOW Helix is offering up to 200 dollars off ALL mattress orders and two free pillows. Get up to 200 dollars off at Helixsleep.com/lockedonnba  Theragun Try Theragun RISK-FREE for THIRTY-DAYS. Go to Theragun.com/LOCKEDON right now and get your Gen 4 Theragun TODAY.  MyBookie Join today and MyBookie will match your deposit 100%, plus they’ll toss you a Free $10 MLB Future wager. All you gotta do is enter promo code LOCKEDONNBA when signing up. Rock Auto Amazing selection. Reliably low prices. All the parts your car will ever need. Visit RockAuto.com and tell them Locked On sent you. Learn more about your ad choices. Visit podcastchoices.com/adchoices