Austin Allen - our future backup?

Im surprised this kid went undrafted, going into the season he was somewhat highly regarded. I could see him sticking on the PS or the active roster as our #3, then becoming our backup next year. Does anyone have thoughts or feedback on this guy?

https://www.profootballfocus.com/news/draft-2018-prospect-preview-austin-allen-may-be-the-best-qb-prospect-in-the-sec