Díaz and Kremer, who were each acquired in the Manny Machado trade with the Los Angeles Dodgers in July, went right to Double-A Bowie as part of the new influx of talent in the organization. Díaz, 22, hit two home runs in the All-Star Futures Game last year and ranks as the No. 37 prospect in the game, according to Baseball America. Kremer, 23, led the minors with 178 strikeouts last season. A third piece from that trade, 22-year-old reliever Zach Pop, was also invited to spring training.