SAN FRANCISCO — A decade ago, the newest Giant was a small part of one of the more interesting trades in recent baseball history. The New York Mets and Milwaukee Brewers thought they had a deal centered around outfielder Carlos Gomez at the deadline in 2015, and it was so far along that word got to Wilmer Flores, then a young Mets infielder who shed tears as he tried to get through a game with rumors swirling. When that trade fell apart, Gomez was sent to Houston in a deal that brought future All-Star closer Josh Hader and three others to Milwaukee. Giants general manager Zack Minasian was in the middle of it all. He ran pro scouting for the Brewers at the time, and as they scrambled to get a second Gomez deal done, Minasian wrote the name “Adrian Houser” on a white board, just in case. At the time, the right-hander was struggling in Double-A. “He was the player that we were able to get thrown in at the end, and he’s turned it into a nice career,” Minasian said on a Zoom call with beat writers Friday. The Giants are hopeful that the best is yet to come.They finalized a two-year deal with Houser on Friday that includes a...