II.off [美 ɔf, ɑf, 英 ɒf]副off often appears as the second element of certain verb structures in English (break off, pay off, take off, etc). For translations, see the relevant verb entry (break, pay, take, etc).
I.on [美 ɑn, ɔn, 英 ɒn]介词on often appears as the second element of certain verb structures in English (count on, lay on, sign on, etc). For translations, see the relevant verb entry (count, lay, sign, etc).
This can include the right for their team to select the next matchup, in order to pick off fighters from the opposing team by selecting favourable matchups.
Likewise, when the pitcher attempts to pick off a runner at second base, the shortstop and second baseman will have arranged in advance which one will cover second base.