My .02... whatever they do, don't fake a play. The fake turns "off" the LBR. IMO, you either sacrifice the BR to 2nd (unless it would be the third out, then you try the play), or you design a play in practice involving the pitcher, catcher, and infielders, and make sure everyone KNOWS what could happen. If you just tell the pitcher to get the ball and throw it to first, but F3 doesn't know to expect the ball, you could have all kinds of problems.