AUG. 9: The Yankees are ready to begin negotiating with Castillo, who worked out at their minor league complex Friday, George A. King III of the New York Post reports. The Yankees would want to use Castillo as a second baseman, with the outfield as a backup plan, King writes.

AUG. 6: While touring Wrigley Field on vacation, Sportsnet’s Ben Nicholson-Smith learned that the Cubs held a private workout for Castillo today (Twitter link).

AUG. 3: Castillo’s workout for the Mariners has been postponed and is expected to be rescheduled, tweets Shannon Drayer of 710 ESPN.

JULY 29: Castillo, who worked out for the Phillies today, has set up a private workout with the Mariners on Sunday as well, reports MLB.com’s Jesse Sanchez (on Twitter). His one-on-one workout with the Red Sox is still set for Friday.

JULY 28, 8:29pm: Ben Badler of Baseball America writes that the Yankees indeed have a private workout scheduled with Castillo.

7:33pm: General Manager Jeff Luhnow says the Astros may schedule a one-on-one workout with Castillo, writes Brian McTaggart of MLB.com.

7:24pm: A source tells Jesse Sanchez of MLB.com (on Twitter) that only the Phillies (on Tuesday) and the Red Sox (Friday) have private workouts set up with Castillo. However, private workouts are in the works for the Yankees and other clubs.

Unsurprisingly, the Twins are not among the teams looking to line up a workout with Castillo, tweets Darren Wolfson of 1500 ESPN. Minnesota likes Castillo, but the expected asking price is too rich for their blood.

3:11pm: Reports indicated that 28 of Major League Baseball’s 30 teams were represented at Rusney Castillo’s showcase over the weekend, and Ben Badler of Baseball America has the latest on the 27-year-old Cuban free agent. Castillo will have private workouts with the Red Sox, Yankees and Phillies this coming week, and Roch Kubatko of MASNsports.com tweets that the Orioles are also arranging a private workout.

Badler lists the White Sox, Mariners, Giants, Blue Jays, Cubs and Braves as other potential suitors. Because multiple teams have interest in getting a deal worked out quickly, however, there aren’t likely to be any further private workouts before a deal gets done, Badler writes. Additionally, Badler has posted some video footage from Castillo’s weekend showcase.

Multiple sources indicated to Badler that the Red Sox had the largest contingent on-hand Saturday for Castillo’s showcase. He notes that Jackie Bradley has more upside at the plate, and Mookie Betts might factor in as a corner outfield option in the long-term due to the presence of Dustin Pedroia, but Boston could be intrigued by Castillo as a corner option as well. He did play right field in Cuba, Badler adds.

The Yankees, meanwhile, could weigh the possibility of trying Castillo at second base, though they could have a corner spot open alongside Jacoby Ellsbury and Brett Gardner as well. Castillo played second base (and some third base) back in 2009-10, but scouts at the showcase weren’t overly impressed with his glovework as an infielder.

Center field is Castillo’s best position, Badler writes, so it stands to reason that the Phillies could view him as an upgrade over the light-hitting Ben Revere. Playing Castillo in center field allows him to maximize his best tool — 70-grade speed.

While the White Sox are very well-versed in the Cuban market — as evidenced by the presence of Jose Abreu, Alexei Ramirez and Dayan Viciedo on their roster — the presence of countrymen on their roster won’t influence Castillo, Badler hears. His decision will come down to financial terms.

Badler adds that the Giants also had a very strong presence at Castillo’s showcase, and he makes sense for them as their system has thinned following a trade for Jake Peavy and their continued interest in Ben Zobrist. The Cubs also had “a team” of evaluators on-hand to witness Castillo, who would bolster an already enviable crop of hitting prospects.