Eligibility/substitution

[mbyron]

COURTESY RUNNERS
1. At any time, the team at bat may use courtesy runners for the pitcher and/or
the catcher.
2. The same individual runner may not be used for both positions (pitcher and
catcher) during the game.
3. Neither the pitcher nor the catcher will be required to leave the game under
such circumstances.
4. Players who have participated in the game in any other capacity are ineligible
to serve as courtesy runners.
5. A player may not run as a courtesy runner for the pitcher or the catcher and
then be used as a substitute for another player in that half inning. If an injury,
illness or ejection occurs and no other runners are available, the courtesy
runner may be used as a substitute.
6. The umpire-in-chief shall record courtesy runner participation and also
announce it to the scorer.
7. A player who violates the courtesy-runner rule is considered to be an illegal
substitute.
a. Should an injury, illness or ejection occur to the courtesy runner, another
courtesy runner for the pitcher or catcher may run.

So, no, this is not a substitution. As long as Jones and Smith have not participated in the game, they may both run for F2 on different occasions.

Yes, Jones may enter on defense, which would not violate provision 5.

If Jones enters the game as a sub, he is no longer eligible to be a CR under provision 4.