9:24pm: Colin Dunlap of the Pittsburgh Post-Gazette reports that Alvarez has been officially called up. The prospect got the news after Indianapolis' game on Tuesday night. ESPN's Buster Olney tweets that Alvarez will be in the lineup against Chicago on Wednesday.
6:55pm: Jenifer Langosch of MLB.com reports that Pedro Alvarez, the No.2 overall pick in the 2008 Amateur Draft, could make his major league debut for Pittsburgh before the end of the week. Langosch reports that Alvarez is in the lineup tonight for Triple-A Indianapolis, and could be called up as soon as Wednesday for that evening's White Sox/Pirates game. One might think the Bucs might announce Alvarez's first game in advance to sell a few extra tickets either against the Sox or when the Indians come to town for a weekend series.
Alvarez will play every day at third base for the Pirates, thus making current baseman Andy LaRoche into a backup or utilityman; Langosch notes that LaRoche has already been taking grounders at second base in preparation for his new role. With Neil Walker locked into the second base job, LaRoche (who was a well-regarded prospect him not too long ago) could be made available to a team looking for an infield backup. The Bucs would certainly have an easier time moving LaRoche than they would dealing Akinori Iwamura's big contract.