Markkanen (back) has been ruled out for Friday's preseason game against the Bucks, K.C. Johnson of the Chicago Tribune reports.
Analysis:
Markkanen was considered doubtful to play earlier in the week, so his absence doesn't come as a surprise. The rookie has now failed to play in the Bulls' first three preseason games, but he's been able to put in some contact work in practice, so it looks like a return for Sunday's contest against New Orleans is possible.