Nick Talbot

Keldon Johnson gave one bit of advice for the hundreds of athletes in the crowd at the Express-News’ second annual Alamo City High School Sports Awards on Wednesday. “Don’t limit yourself,” the San Antonio Spurs forward told the crowd of nearly 1,000 at the Zaragoza Theater at Six Flags. “Everyone is going to tell you that you can’t do this, or you can’t do that. You are not big enough, strong enough or fast enough. There is always someone who will give you an excuse about why you can’t do somet…