The Red Sox have promoted infield prospect Brainer Bonaci from High-A Greenville to Double-A Portland, per the club’s minor-league transactions log.
Bonaci, 21, is currently regarded by Baseball America as the No. 11 prospect in Boston’s farm system. The Venezuela native originally signed with the Red Sox for $290,000 as an international free agent coming out of Catia La Mar on his 16th birthday in July 2018.
After being held up by visa issues this spring and reporting to camp late as a result, Bonaci did not report to Greenville until late April. The switch-hitter then proceeded to bat a stout .301/.353/.473 with 15 doubles, one triple, nine home runs, 38 RBIs, 34 runs scored, six stolen bases, 21 walks, and 63 strikeouts in 63 games (278 plate appearances) with the Drive. That includes a .283/.343/.440 slash from the left side of the plate and a .424/.424/.697 slash line from the right side.
Among 80 South Atlantic League hitters who came into play Wednesday with at least 250 plate appearances under their belt, Bonaci ranks 24th in strikeout rate (22.7 percent), fifth in batting average, 26th in on-base percentage, 10th in slugging percentage, 10th in OPS (.825), 27th in isolated power (.172), and 13th in wRC+ (124), per FanGraphs.
Defensively, Bonaci saw playing time at four different positions to begin the year with the Drive. The 5-foot-10, 164-pounder logged 172 innings at second base, 28 innings at third base, and 278 2/3 innings at shortstop, committing a total of five errors in 198 chances. He also appeared in one game as a left fielder earlier this season, but has very limited experience in the outfield outside of that.
Bonaci, who does not turn 22 until next summer, can become eligible for the Rule 5 Draft this winter if he is not added to Boston’s 40-man roster by the protection deadline in November. How he fares against more advanced pitching in the upper minors with the Sea Dogs will surely factor into the club’s decision there.
In Portland, Bonaci is slated to join a talented, yet crowded infield mix that includes Chase Meidroth, Blaze Jordan, Matthew Lugo, Alex Binelas, and Nick Yorke. He will also help fill in for shortstop Marcelo Mayer, who was placed on the 7-day injured list with left shoulder inflammation this past Saturday.
Mayer, Boston’s top prospect, is eligible to come off the injured list on Thursday since his stint on the injured list was backdated to August 3. It remains to be seen if Bonaci will remain with Portland once Mayer is healthy enough to return to action.
Regardless, Bonaci is leading off and starting at shortstop for the Sea Dogs in their contest against the Hartford Yard Goats at Hadlock Field on Wednesday night.
(Picture of Brainer Bonaci: Gwinn Davis/Greenville Drive)
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