The Clinton LumberKings are playoff-bound after they beat the Peoria Chiefs 4-2 and the Wisconsin Timber Rattlers lost 6-0 to the Quad Cities River Bandits.

The LumberKings join the Beloit Snappers, the Cedar Rapids Kernels and the Quad Cities River Bandits as the Western Division teams in this year’s Midwest League playoffs. The Eastern Division teams are the Bowling Green Hot Rods, the Fort Wayne TinCaps, the Great Lakes Loons and the South Bend Silver Hawks.

The quarterfinals rounds begin Wednesday.

Guillon impresses in final outing

Dayton Dragons LHP Ismael Guillon was impressive in his final start of the season, striking out nine batters in the first six innings of Dayton’s 8-0 win over the Great Lakes Loons. He gave up only one hit and one walk.

Three other pitchers combined to no-hit the Loons during the final three innings. RHP Alejandro Chacin struck out all three batters he faced in the 9th inning. He didn’t earn a save in this game, but he has eight for the Dragons this season.

Walker earns first MLB win

Seattle Mariners prospect Taijuan Walker, who pitched for the 2011 Clinton LumberKings, was impressive in his major-league debut. The hard-throwing righthander pitched five innings of two-hit ball to earn his first major-league win Friday against the Houston Astros.

In addition to two hits, Walker gave up one unearned run and walked one batter. He struck out two.