Performance of the Week: South Lyon East's Mason Crosby

October 30, 2026

Mason Crosby headshot Mason Crosby ♦ South Lyon East
Senior ♦ Tennis

Crosby completed a perfect season last weekend 30-0, with his final four wins at the Lower Peninsula Division 2 Finals earning him the championship at No. 1 singles. Top-seeded in the bracket, he clinched with a 6-1, 6-2 victory over Birmingham Seaholm’s second-seeded Carter Griffith. 

This was Crosby’s third appearance in a championship match at the Finals; he finished No. 2 singles runner-up as a freshman and No. 1 singles runner-up as a junior. Crosby’s only losses those seasons came in those title-deciding matches, and his sophomore-year Finals ended with a first-round defeat against Griffith. Crosby finished with a four-year singles record of 123-5 – with those wins ranking 13th on the MHSAA career list – and claimed 19 victories this fall by 6-0, 6-0 scores. He also plays basketball for South Lyon East, and he’s hoping to continue his tennis career at the collegiate level. His brother Cameron plays at Kalamazoo College. 

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MHSAA.com's "Performance of the Week" features are powered by MI Student Aid, a division within the Department of Lifelong Education, Advancement, and Potential (MiLEAP). MI Student Aid encourages students to pursue postsecondary education by providing access to student financial resources and information. MI Student Aid administers the state’s 529 college savings programs (MET/MESP), as well as scholarship and grant programs that help make college Accessible, Affordable and Attainable for you. Connect with MI Student Aid at www.michigan.gov/mistudentaid and find more information on Facebook and X @mistudentaid.

Past 2026-27 honorees

Oct. 23: Addilyn Duflo, Bath golf - Read
Oct. 16: Levi  Lengemann, Imlay City tennis - Read
Oct. 9: Olivia Buford, Sterling Heights Stevenson swimming - Read
Oct. 2: Sophia McCollum, Muskegon Reeths-Puffer golf - Read
Sept. 25: Jenna Middleton, Kingsley volleyball - Read
Sept. 18: Caden Livermore, Grandville cross country - Read

(Action photo by High School Sports Scene.)

Performance of the Week: Big Rapids' Kate Posey

September 5, 2025

Kate Posey headshotKate Posey ♦ Big Rapids
Senior ♦ Golf

Posey is off to a magnificent start to her senior season, and it’s included a career first. A four-year high school golfer who tied for 18th individually at last season’s Lower Peninsula Division 3 Final, Posey drilled her first hole-in-one, on No. 8 at Katke Golf Course at Ferris State on Aug. 26 during her team’s first Central State Activities Association event this fall. She used a 9-iron to ace the 117-yard hole.

Big Rapids is the reigning CSAA champion and won the tournament, with Posey shooting a first-place 75. She then finished second at the Whitehall Invitational a day later and Tuesday carded an 80 to win the Lady Tullymore Invitational against a field that included several top teams from the west side of the state. Posey also serves as manager/statistician for Big Rapids’ girls basketball and softball teams and would like to study sports medicine and play golf in college.

@mhsaasports ⛳️POW: Kate Posey #bigrapids #highschoolsports #performanceoftheweek #mistudentaid #MHSAA ♬ Bright and fun upbeat pops, Kids, Animals, Pets, Fun, Cute, Happy, Playful, Upbeat(1465232) - SAKUMAMATATA

@mhsaasports ⛳️POW: Kate Posey #funfacts #tiktalk #performanceoftheweek #mistudentaid #MHSAA ♬ Girly and cute synth pop - SAKUMAMATATA

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MHSAA.com's "Performance of the Week" features are powered by MI Student Aid, a division within the Department of Lifelong Education, Advancement, and Potential (MiLEAP). MI Student Aid encourages students to pursue postsecondary education by providing access to student financial resources and information. MI Student Aid administers the state’s 529 college savings programs (MET/MESP), as well as scholarship and grant programs that help make college Accessible, Affordable and Attainable for you. Connect with MI Student Aid at www.michigan.gov/mistudentaid and find more information on Facebook and Twitter @mistudentaid.

(Photos courtesy of the Big Rapids girls golf program.)