MU's Mara Häusler and Arianna Fisher competed in the triple jump in Eugene, Oregon.
Nachev is the first triple jumper to earn All-American honors for MU since 2016.
The Missourian had previously reported this possible hire Monday night.
Four more Missouri athletes will compete Friday.
Five Missouri athletes travel to Eugene, Oregon, for the Tigers' last athletic event of 2020-21.
The former Tigers both made it through golf's longest day to receive an invitation to Torrey Pines Golf Course.
Missouri and Kansas will battle Dec. 11, 2021, in Lawrence, Kansas.