Pie, 22, is hitting .444 (16-for-36) with a home run and six RBI in 11 games with Iowa this season. He has nine walks and 16 runs scored, having hit safely in 10 of his 11 appearances with a .583 slugging percentage and a .543 on-base percentage.
Originally signed as a non-drafted free agent by Chicago July 3, 2001, Pie (pronounced Pee-yay) has appeared in 498 career minor league games with a .296 batting average (587-for-1,981), 43 home runs and 220 RBI. He has 173 walks and 99 stolen bases.
Following the 2006 season, Pie was named the top prospect in the Cubs organization by Baseball America. He earned a Gold Glove in the 2006 Dominican Winter League following the season.
Pie, who will wear number 17, is looking to make his Major League debut and is available for today's game vs. San Diego at 1:20 p.m. CT.
Guzman, 25, has posted a 2.45 ERA (2 ER/7.1 IP) while walking one and striking out eight in four relief appearances for Chicago this season. He was originally signed by the Cubs as a minor league free agent November 12, 1999.