[Roberton3]

As I have posited, it sometimes makes sense, in certain football situations to employ a similar "mixed strategy", for example on second and short, mixing between low risk options that have a high likelihood of getting you a first down and controlling the clock, and higher risk/higher reward strategies like play-action passing that give you a chance for scoring (but also increase the risk of either an incompletion or a turnover). 

You're greatly understating your point.  Almost every play call in football is part of a mixed strategy.  The only exception is a situation where, even if the other team knows 100% for certain the exact play you're going to call, you'd still call that play.  Those situations are pretty rare.

[Roberton3]

As I have posited, it sometimes makes sense, in certain football situations to employ a similar "mixed strategy", for example on second and short, mixing between low risk options that have a high likelihood of getting you a first down and controlling the clock, and higher risk/higher reward strategies like play-action passing that give you a chance for scoring (but also increase the risk of either an incompletion or a turnover). 

You're greatly understating your point.  Almost every play call in football is part of a mixed strategy.  The only exception is a situation where, even if the other team knows 100% for certain the exact play you're going to call, you'd still call that play.  Those situations are pretty rare.