Winger was hoping the Caps would offer a four-year deal. When they balked, he took a three-year offer from Sharks.
Five-day session at Kettler will feature top prospects and three of four 2015 draft picks.
“As I thought about the trade, and going to Washington, a team that had a really good chance of winning a Stanley Cup last year,” Oshie said.
The 2014 U.S. Olympic hero comes to Washington for Troy Brouwer, minor leaguer Pheonix Copley and a draft pick.
Veteran right wing brings qualities Capitals hope will precipitate success in Stanley Cup playoffs.
Williams has shown an ability to produce at a top-six level and improve his linemates.
Oshie and Williams both seem bound for the top-six, but the Capitals are waiting until training camp to slide them into any particular spot.
A day after signing Justin Williams, Washington lands another high-profile forward by sending Troy Brouwer to St. Louis.
MacLellan didn't rule out signing another piece, but said the Capitals need to re-sign their three restricted free agents first.
The two-year, $6.5 million deal patches a top-six need for the Capitals, but what comes next?
In wake of big splashes by division rivals Pittsburgh and Columbus, the Caps make a move for Kings winger.
For his first act outside Washington, Green's contract is worth $18 million in total value, evenly spaced out to $6 million per season.
The Capitals addressed their No. 7 blue-line vacancy with the 28-year-old former Pittsburgh Penguin.