Kyler Murray won't succeed if he tries to play both football AND baseball at the same time ... so says Drew Henson, who tells TMZ Sports the two tasks are just too tough.
Don't get it twisted ... Drew clearly thinks Kyler's got the talent -- he just knows, as a guy who played both on the diamond and under center, that it just wouldn't work.
"The position of quarterback, it's a year-round job," Henson says ... "Any team that's going to invest that type of money in you isn't going to want you to be away in the offseason.