Ohio State has filled their basketball staff with the announcement today that Grand Canyon’s Jamall Walker will join the program as an assistant coach. Welcome to Buckeye Nation @JamallWalker‼️@JakeDiebler has announced the addition of Jamall Walker to the coaching staff as Assistant Coach. Walker comes to Columbus after spending four seasons on Bryce Drew’s staff at Grand Canyon. Read More: https://t.co/JsdCmn3Fn6 pic.twitter.com/jE0kBaUYXW — Ohio State Hoops 🌰 (@OhioStateHoops) April 10,…