Former Celtic (now Brooklyn Net) Paul Pierce put on some red socks and posted a pic on Instagram in support his favorite baseball team. . . . John Travolta, in town to film “The Forger,” dined at The Palm on Saturday night. . . . After attending her husband’s football game in Foxborough on Sunday, Gisele Bundchen dropped her stepson, Jack, 6, at Back Bay station. She gave him a big kiss and sent him on his way (with his adult companion).