Wiktionary
send on
vb. (context sports transitive English) To introduce a substitute into the game.
WordNet
send on
v. send or ship onward from an intermediate post or station in transit; "forward my mail" [syn: forward]
Usage examples of "send on".
Gentry that he was just the hand to send on a trading expedition to New Orleans.
The wild things of the wilderness I could draw to me or send on their way merely by concentrating upon them.