The Baltimore Orioles are set to promote top prospect Coby Mayo on September 1 as MLB rosters expand from 26 to 28 players. Mayo, who struggled in his first stint in the majors with a 1-for-17 performance, has excelled in Triple-A, hitting .293 with 22 home runs and a .943 OPS this season. His promotion comes at a crucial time due to injuries in the Orioles' infield, including Ryan Mountcastle and Jordan Westburg. Mayo, now the Orioles' top-ranked prospect after Jackson Holliday's graduation, has worked on improving his defense during his time in the minors. While he may not secure regular playing time immediately, his potential to add power to the lineup could be significant for the team's stretch run. The Orioles' management is optimistic about Mayo's impact, having hinted at his return earlier in the season.