The Phillies have only ever played Miller at shortstop since signing him, and it’s the position at which he’d be the most valuable, but with Trea Turner entrenched ahead of him, it might behoove them to expand his defensive horizons in 2026 in case, be it via trade or injury, it turns out he’s needed at either second or third. Should he turn out to be a more comfortable, consistent defender at either of those positions, then a permanent move should be considered. Miller is going to be good enough at shortstop to play there, but only just so. If he can be a plus glove at second or third, that might be a better long-term fit.