Aguiar will start Monday's game against the Astros, Charlie Goldsmith of The Cincinnati Enquirer reports.
Aguiar will be pitching after just three days of rest, though the Reds seem to be comfortable sending him back out for another start after he threw 78 pitches over four innings Thursday. The 23-year-old righty has allowed 10 earned runs in just 14 innings through his first three MLB starts and will be facing an Astros offense that has posted a .748 OPS since the start of August.