ST. PETERSBURG — The Rays made two moves Monday to provide future depth, signing veteran OF Grady Sizemore to a minor-league deal and getting C Bobby Wilson to Triple-A Durham.But they were also weighing a move that would have an immediate impact on their bullpen, deciding whether to promote RHP Ronald Belisario , who has 17 saves at Triple-A Durham, or let him leave as a free agent.Belisario notified the Rays Monday he would use his opt-out clause. They have until Wednesday to decide.Belisario, 32, was in spring camp with the Rays but slowed by a fractured left shoulder. In 27 Durham appearances, the five-year big-league vet has a 3.26 ERA and 17 saves in 19 opportunities."We're prepared for whatever they decide," agent Jim McNamara said. "He should be pitching in the big leagues somewhere and not Triple A."Sizemore, released June 1 by the Phillies, will work out for a few days in Port Charlotte then join one of the Rays' minor-league teams as they assess whether, and how quickly, he can help, mostly with his left-handed bat.A three-time All-Star for Cleveland, Sizemore, 32, didn't play in the majors in 2012-13 due to injuries and has been a part-timer with the Red Sox and Phillies the past two seasons, hitting .235 with five homers and 33 RBIs in 151 games."I would imagine where we're at, if he's good to go and feels good and he's healthy we could use him," Rays manager Kevin Cash said. "But I don't think there is a timetable set. We're just going to kind of let it play out and see how he feels."Wilson was designated for assignment Thursday, cleared waivers and accepted an assignment to Durham, which Cash said was good: "We know he can help us out in a pinch up here.'' MEDICAL MATTERS: After being rained out Monday in Port Charlotte, LHP Matt Moore (Tommy John rehab) will try again at 5 today to make his third rehab start for the advanced Class A Stone Crabs. … DH/OF John Jaso (bruised left wrist) will join the Rays on the upcoming road trip to start taking full batting practice, but he will need a rehab assignment and is several weeks from being activated. … RHP Jake Odorizzi (oblique strain) and RHP Andrew Bellatti (sore shoulder) played catch, 35 throws at 75 feet, and felt good. … LHP Drew Smyly (torn labrum) also played catch. … INF Tim Beckham (right hamstring strain) took batting practice again and could start a rehab assignment within a week. GOING HIGH TECH: The KinaTrax technology company announced it has teamed with the Rays to install a groundbreaking system that will allow pitchers' biomechanics to be captured in real time during competition rather than in lab-style settings. KinaTrax will use eight high-speed cameras installed around the stadium to capture live 3D visual images during games, though the data would be viewed later. The primary use would be for injury assessment. Rays officials declined comment. BRYCE POWER: Nats OF Bryce Harper had good memories of his first appearance at the Trop as a high school sophomore during a 2009 power showcase event, hitting two balls — with an aluminum bat — off the back wall, the longest estimated at 502 feet. "At that young of an age to be able to do something like that even with an alum bat was pretty spectacular," Harper said. "We all had a blast." MISCELLANY: The Rays signed eighth-round pick RHP Reece Karalus (Santa Clara) and No. 10 RHP Sam Triece (Washington State), putting seven of their top 11 under contract, though none of their top three. … OF Steven Souza tied Matt Joyce 's team record of five walks in a game, the first AL rookie to do so since Cleveland's Jim Norris in 1971. Souza is the first player to walk five times and not score in a nine-inning game since Barry Bonds in 2004.