In the quiet arithmetic of a pennant race, the Toronto Blue Jays and Houston Astros have agreed to exchange what each lacks for what the other holds in surplus. Daulton Varsho, a defender whose glove speaks louder than his bat, heads to Houston in search of October relevance, while Spencer Arrighetti travels north to offer Toronto the pitching depth a rebuilding stretch demands. It is the kind of trade that reminds us that value in baseball — as in life — is rarely singular, and that what one team sets aside, another may find essential.