Jamie-Lynn Sigler announced via twitter that she's tying the knot with the Washington Nationals infielder. The actress also tweeted a shot of her big ole rock! A source tells US Weekly that Jamie is over the moon and couldn't be happier. Although they have only been together for a year, they both know that this is it for both of them. This will be the second marriage for Jamie-Lynn who was married to A.J. Discala from 2003-2005. Congratulations to the happy couple!