When both R1 and B2 miss second base and F4 stands on second to appeal, what happens?

In this scenario, R1 and B2 missing second base creates a situation where an appeal can be made. When F4 stands on second base to appeal, the action of F4 is specifically aimed at B2, as the appeal is being made for the base that B2 missed. In this case, the umpire will rule that B2 is out upon the appeal because B2 is the runner who is being directly appealed.

R1, on the other hand, has not been appealed on, which means R1 is still considered safe at third base unless there are other outs or conditions affecting the play. Therefore, while B2 is out due to the missed base at second and the successful appeal, R1 is unaffected by that appeal.

This situation highlights the distinction in responsibilities and implications of appeals in baseball. Each runner can be treated independently with respect to missed bases, allowing for the situation where one can be declared out while the other remains safe.