The Josh Donaldson signing adds a potentially potent bat to the middle of Atlanta’s lineup and is a clear sign the Braves are eyeing more than just a division title in 2019. The move also could be seen as a signal that the Braves don’t think Austin Riley, the former DeSoto Central High star, is quite ready for everyday duty at third base. Riley spent the latter half of 2018 at Triple-A Gwinnett, where he batted .282 (.346 on-base percentage) with 12 home runs in 75 games. He has 71 bombs in four pro seasons. His defense reportedly is big league-caliber. But there’s no need to rush him. Atlanta’s No. 5 prospect (per MLB Pipeline) is only 21 — he’ll be 22 in April – and isn’t yet on the 40-man roster. Riley struck out 95 times and walked 26 over 291 at-bats at Gwinnett, so there’s still room for improvement. It’s possible that if Donaldson struggles, as he did in an injury-plagued 2018, Riley could get a midseason call-up. Though he’s never played anywhere but third base, the Braves also could try Riley in left field at Gwinnett as a way of finding him a spot. Regardless, his time will come. Mississippi baseball aficionados will just have to wait a bit. P.S. Ole Miss alum Braxton Lee cleared waivers and was outrighted to Double-A Jacksonville by Miami. Lee, a speedy outfielder, hit .176 in eight big league games last season and .233 in the minors.