To no one's surprise TO MLB18

Kenley Jansen and Nolan Arenado are the newcomers to the group. "MLB The Show 18" has 29 players rated 90 or above, which is a threshold that has seen decreasing numbers in recent years.

The Yankees enter the season with the best roster in the league, according to the game. The team features a lineup that includes three players rated 90-plus and 13 who are rated 80 or above.
Trailing close behind are the Nationals (three at 90-plus, 11 at 80-plus+), the reigning champion Astros (two at 90-plus, 13 at 80-plus) and the Dodgers (two at 90-plus and 13 at 80-plus). Houston has a remarkable 10 players rated at least 86. The Mets are the only other team with three 90-plus-rated players while the Cubs, Red Sox, Giants, Indians and Mariners all feature rosters with double-digit players rated 80-plus.

To no one's surprise, the Marlins are the weakest team in the game with only two players above an 80 (the highest an 83) following their offseason fire sale.
"MLB The Show 18" also features the highly anticipated debut of Shohei Ohtani. In an unorthodox move, Ohtani will be available on the game's shipped roster. MLB18 Stubs

The usual procedure for rookies is that they aren't added to the game until they become a member of the MLB Players Association, which requires an appearance in a major league game. That means rookies who get their first action early in a season typically don't make it into a roster update until mid-April. Developer SCEA, however, reached an agreement individually with Ohtani for his rights, which allowed it to include him before that milestone happens.