Daily Red Sox Links: Rusney Castillo, Mike Napoli

Alex Speier presents his obligatory primer on Rusney Castillo. (Alex Speier; WEEI.com)

While watching Castillo play will be fun over the next week or so, it's more about getting him acclimated to the majors than his results. (Tim Britton; Providence Journal)

Watching the new outfielder does give us a reason to watch the final games, but our expectations should be tempered. (Chad Finn; Boston.com)

Injuries has made this a strange season for Mike Napoli. (John Tomase; Boston Herald)

Boston's young pitchers haven't been great lately, and fatigue could be a big reason for it. (Jen McCaffrey; Masslive.com)

Besides fatigue, how else can these youngsters improve? (Alex Skillin; Fire Brand of the AL)

With an open GM spot in Arizona, the Red Sox could lose a member of their front office. (Gordon Edes; ESPN Boston)