East Notes: Rosario, Red Sox, Chapman

As Baseball America’s fifth-ranked prospect, the Mets’ Amed Rosario could conceivably help a scuffling team that has gotten little production from the left side of its infield this year. Despite the Mets’ struggles, though, and the strong likelihood that the Super Two deadline has passed, a promotion isn’t imminent, according to Ken Davidoff of the New York Post. Instead, the Mets want the 21-year-old to continue developing with Triple-A Las Vegas, where he has slashed .339/.379/.500 with six home runs and 11 stolen bases in 269 plate appearances. While Rosario’s in a rather hitter-friendly environment, his output has still been 30 percent better than the Pacific Coast League average. “I think so far this season is so far going pretty excellent, I would say,” Rosario told Davidoff through an interpreter. “I think we’re really seeing the fruits of the labor that’s been put in.”

More from New York and another East Coast city:

• Red Sox third baseman Pablo Sandoval was out of the lineup Saturday, and he’ll likely sit through at least Monday as they work with him on his defensive issues, reports Ian Browne of MLB.com. Sandoval has made four errors in only 48 chances, notes Browne, and has already posted minus-6 Defensive Runs Saved in just 186 1/3 innings at the hot corner. Now in the third season of a five-year, $95MM contract, Sandoval has also acquitted himself poorly on the offensive side, having batted just .205/.253/.364 in 95 plate appearances.
• The Yankees expect closer Aroldis Chapman to come off the disabled list next weekend, manager Joe Girardi said Saturday (via Mark Fischer of NJ.com). The flamethrowing southpaw landed on the DL on May 13 with an inflamed left rotator cuff, which came after back-to-back rough outings that saw Chapman combine to allow four earned runs on six hits and two walks (three strikeouts) over 1 1/3 innings. Prior to those performances, Chapman gave up only one earned run, six hits and four walks, with 18 punchouts, in 11 1/3 frames.
• Red Sox left-hander Eduardo Rodriguez’s recovery from a partial dislocation of his right kneecap is on an encouraging path, writes Jason Mastrodonato of the Boston Herald. Rodriguez played catch from 130 to 140 feet Saturday, after which manager John Farrell stated: “He’s made, I think, very good progress in the days since being examined by Dr. (James) Andrews. We’re taking this in five-day work increments. He’s coming up on this first five days. We’ll map out increases in physical activity, agility work, all that, after tomorrow. We would hope in the coming days, he’s back on the mound here soon.” The 24-year-old was in the midst of arguably his best season before the injury, with a 3.54 ERA, 9.59 K/9 and 3.1 BB/9 in 61 innings.