With the signing of defenseman Calle Rosen earlier this week, the Blues are down to four unrestricted free agents to sign: Nick Leddy, Tyler Bozak, Ville Husso, and David Perron. Leddy more than likely will explore the open market, though having him around on the back end on the playoff run showed his value. Leddy’s re-signing would allow a struggling defenseman such as Marco Scandella, who has two years left on his $3,275,000 per year deal, to be a useful trade piece. Ditching Scandella brings down the overall impact of a Leddy extension on the team, so there’s still a possibility Leddy remains a Blue if the chips fall in the right spot.