"He doesn't come with as much attention, but from a well-rounded baseball skill standpoint he made a good impression," manager A.J. Hinch said.
Fontana, who was a second-round pick in 2012, is not among the Astros' top 10 prospects, according to Baseball America.
Also sent to minor-league camp were
The other non-roster invitees are outfielder
Correa (No. 1) and Appel (No. 2) are considered the team's top two prospects, according to Baseball America. Moran (No. 7) is also considered a top-10 prospect.
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