Luis Arraez didn't want to leave the San Francisco Giants. Luis Arraez is TradedSan Francisco Giants president of baseball operations Buster Posey. In addition to having one of his best offensive seasons, Arraez is now seen as an above-average defender at the position this season. That's what put Arraez on the trade market, along with other Giants who had expiring deals this season. There are also several long-term contracts San Francisco would like to get out from under as baseball heads toward a potential lockout after this season.