The Union-Tribune’s John Maffei picks all of this weekend’s high school football playoff games. Despite heavy rain in the forecast, all games will be played as scheduled. Kickoff is 7 p.m., unless noted:

Open Division

Semifinals

(4) Cathedral Catholic (8-2) at (1) Mission Hills (9-1)

Preview: Cathedral Catholic, the Western League champion, is led by Cal-bound Brady Palmer, who has thrown for 1,656 yards and 16 touchdowns in seven games. Honor Fa’alave-Johnson has 1,206 yards rushing and receiving and has scored 18 total TDs. Willie Flores has rushed for 654 yards and Isaac Cook has 32 catches for 833 yards and 7 TDs. Defensively, the Dons have 18 sacks and 6 interceptions. … Mission Hills is led by QB Troy Huhn. His targets are Myzael Quackenbush, Brayden Roberson, Josh Gonzalez and

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