The Mets may be struggling, but they may have also found a gem in their new rookie call-up, AJ Ewing. Their outfield prospect made his season debut on May 12, going 1-for-2 with a triple and 3 walks. Through one game, Ewing's OPS skyrockets to 1.500. The sample size is small, but the Mets have optimism in store. That leads fantasy baseball managers to wonder — is he a must-add? Fantasy Baseball Impact The Mets did not call up Ewing prematurely. Yes, he came up earlier than expected, but he has been dominating both Double-A and Triple-A baseball this year. Ewing had a .349 batting average in Double-A Binghampton and a .326 batting average in Triple-A Syracuse. Now with Luis Robert Jr. sidelined indefinitely, the Mets need Ewing to play the outfield. Ewing is the Mets' No. 2 prospect. The 21-year-old is a 4th-round draft pick from Springboro High School in Ohio, selected in 2023. Ewing's scouting report highlights him as a great hitter with versatile ability to hit every pitch style to all sides of the field.…