Pat Bonner believes that Brendan Rodgers made a mistake against St Johnstone that could end up being costly in the Scottish Premiership title race. With the league table now tighter than it ever has been at any point over the last few seasons, the eventual winners could be decided on small margins. One of those could be goal difference. As it stands, Celtic are +36 and Rangers are +37. And Pat Bonner believes that the substitution Brendan Rodgers made against St Johnstone could end up being crucial in deciding who wins the title. After St Johnstone scored their goal, Bonner seemed bemused that…
