Logan Thomas signing is bizarre. Getting Ajayi back even a week or two earlier, plus having that short term IR in your back pocket is much more valuable than having Logan Thomas as your third stringer,
Logan was the worst QB of his class statistically, and usually athletic QBs get a boost in passer rating for whatever reason. So to have a bad passer rating as an athletic QB means you are really bad. On top of that the Cardinals had hot garbage at QB for the playoff game and chose that garbage over Thomas. He does have huge hands though.
Moves like this and the Sanchez extension really makes me question Tannenbaum as the self proclaimed analytics guru.