An experienced journalist learns how to deal with unattributed sources. No pitcher wants to see his name in the paper throwing Garver under the bus. If Reusse asks, say, Gibson, "do you prefer throwing to Bobby Wilson," Gibby might smile and say, "look, I'm not going to say that." It's his way of not saying what he's saying - he could answer a different way if he really had no opinion. Although I'm inventing this particular dialog, I presume Reusse got a few of those, and decided it was solid enough to run with. The turn of phrase isn't literal, but gets the meaning across.