It may cut it in half - it is still significant. I would think the signing bonus is taxed in Texas though. I could be wrong.
Signing bonuses are taxed by state they were signed in, but any other bonus and guarantees can be taxed...
"However, for professional athletes, taxation becomes extremely complex because an athlete’s services are provided in a large number of states, cities, and counties, each of which may impose a tax on that player. In addition to games played in various states, a player may also have off-season workouts, exhibition games, training camp, practices, and other mandatory appearances in other states. This may lead to over a dozen states and/or cities seeking to tax a portion of the player’s income."
http://entertainment-tax-advisors.c...ing-bonus-agreement-can-minimize-state-taxes/
As I said there would be a difference, no doubt, but it is not as big as you would think.