i don't think he ever gave a name, but did say he was in the twins organization.
Anyway, I wouldn't be worried about your brother's ERA, especially given the low number of innings pitched and his level. It's not like he's, say, throwing a wild pitch per inning like one of his teammates...
But in general, take his numbers with a grain of salt for now, kind of like you'd treat spring training stats (although good numbers like his K/IP and K/BB ratios are encouraging, obviously).
(And of course
we care enough to look!