Having acquired Juan Uribe and Kelly Johnson from the Braves, the Mets have designated John Mayberry Jr. for assignment. Signed over the winter as a player who could dominate left-handed pitching, Mayberry struggled in his time with the team, hitting just .164/.227/.318 in 119 plate appearances.
Mayberry was unsurprisingly very ineffective against right-handed pitchers, but he didn't capitalize on his opportunities against left-handed pitching, either. A longtime Phillies outfielder, Mayberry was dealt by the Phillies to the Blue Jays at the end of August last year. Overall, he excelled as a pinch hitter last year, though performing well as a pinch hitter hardly seems like a repeatable skill.
It would appear Mayberry's role on the team will be filled by Johnson, who has spent time in left field, first base, and third base for the Braves this year. He doesn't have big splits over the course of his career, but he has been slightly better against left-handed pitching than right-handed pitching.