Tim Alderson is a pitcher, and threw 5 IP his age 18 season. In Rookie Ball. Noonan also spent his entire age 18 season in Rookie ball. Adrian Gonzalez was the number 1 pick, and only got 29 ABs in Low A at age 18(after hitting .295/.396/.358/.754 in Rookie Ball). Same thing with Hermida(47 NYP ABs, .224/.302/.321/.623 in Rookie Ball), Josh Hamilton(72 NYP ABs, .194/.205/.236/.441), James Loney, and Derek Jeter(37 SAL ABs, .593 OPS in Rookie, .688 in SAL). Prince Fielder split time between the MWL(.241/.303/.384/.687) and Rookie ball. Baldelli spent his entire age 18 year in Rookie Ball(.216/.254/.310/.564 in 232 ABs), same as Casey Kotchman, Ian Stewart, Billy Butler, Alex Rios(.269/.319/.325/.644, 234 ABs), Austin Kearns, Lastings Milledge(26 ABs), Jeff Francoeur, Joe Mauer, Jason Kendall(.261/.311/.279/.590, 111 ABs), and Jack Cust. It's not something to be super worried about.