CHARLOTTE, N.C. — Tyson Walker scored 19 points and Spartans coach Tom Izzo picked up his 20th win in the first round of the NCAA Tournament as his ninth-seeded Spartans beat the eighth-seeded Bulldogs 69-51 on Thursday in the West Region. — Dalton Knecht scored 23 points and Tennessee shot 64% in the first half to build a huge lead …