“Sopranos” beauty Jamie-Lynn Sigler is dating Washington Nationals infielder Cutter Dykstra, son of former Mets star Lenny Dykstra, Page Six can reveal. Sources tell us the actress has been dating Dykstra “for a few months, and things are going really well,” a source said, adding, “I haven’t seen her this happy in a long time.” Sigler, who is living in LA, was introduced to Dykstra through mutual friends, Yankees star Nick Swisher and his actress wife, Joanna Garcia. Sigler was previously linked to New York Jet Mark Sanchez and her “Entourage” co-star Jerry Ferrara. Lenny Dykstra was sentenced to three years in state prison earlier this month after a judge rejected his bid to change his no-contest plea to grand theft auto and filing a false financial statement. But despite this, Cutter seems very happy with Sigler, who has a role in the Jimmy Fallon pilot “Guys With Kids,” previously referred to as “DILFs.” After a break together in Florida, he tweeted at her, “Had an amazing time with you, i miss you so much. The last week flew by.”