Tony Kemp, Houston's No. 11 prospect on the team's Top 30 list, was 3-for-4 with two RBIs, while Alex Presley and Robbie Grossman added two hits each. The Astros' No. 30 prospect, Tyler White, corked his third long ball of the playoffs and led all PCL hitters with 10 RBIs in the postseason.
Kemp was named Most Valuable Player of the PCL playoffs after going 15-for-37 (.405) with three doubles, nine RBIs and seven runs scored in nine games. He also stole two bases.
Appel earned the win, striking out 10 while allowing three runs on six hits and two walks in 5 2/3 innings.
The Grizzlies move on to meet the International League champion Columbus Clippers (Indians) in the Triple-A National Championship on Tuesday in El Paso, Texas.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.