Nonsense. I have done the calculations.
here is your calculation again for 5 year $75M contract $15M AAV 25M signing bonus:
Base salary ---------- $1----$1----- $1----- $12.25 -$12.25
Signing bonus -------$5 ---$5----- $5 -----$5-------- $5
Yr 2 restruct bonus --------$2.81 $2.81- $2.81---- $2.81
Yr 3 restruct bonus -----------------$3.75- $3.75---- $3.75
Year totals ------------$6---- $9---- $13---- $23.81-- $23.81
signing bonus per year = $25M/5 = $5M
to turn yr 2 salary to $1M - use yr 2 restructuring bonus = ($75M - $25M - $1M)/4 = $2.81M
to turn yr 3 salary to $1M - use yr 3 restructuring bonus = ($75M - $25M - $1M)/3 = $3.75M