The Boston Celtics are feeling themselves. Holders of a 2-0 series lead in their Eastern Conference semifinals matchup with the Philadelphia 76ers, the Celtics are playing like a confident group. And they certainly looked the part Friday afternoon upon arriving in Philly. Check out the T-shirts on Jaylen Brown, Jayson Tatum, Marcus Morris and, especially, Terry Rozier: The “Scary Terry” phenomenon clearly has taken hold in the Celtics’ locker room. Also, props to Rozier, Brown and Tatum for not being ashamed of rocking their own T-shirts. As for the series, Boston will look to take a commanding 3-0 lead Saturday night in ... NESN.com