Facing the Diamondbacks in the league's final game before the All-Star Break, Bumgarner carried a no-hitter into the eighth inning. But why make a cameo in an exhibition when you can stage a one-man show?
Bumgarner (10-4) retired 25 of the 28 batters he faced, including two double plays, and walked one while going the distance for the third time this season.
Lamb's single not only wrecked Bumgarner's try at his first career no-no, but derailed any hopes the Giants had of notching their 18th in franchise history - or of extending their streak to five consecutive seasons with a no-hitter recorded before mid-July.
Bumgarner's bid for a flawless game ended with two outs in the top of the fifth when Lamb hit a fly ball toward the right field line. Lamb also reached on an error in the fifth when right fielder Gregor Blanco dropped a flyball.
"I did, actually", he said.
Bumgarner, an All-Star Game selection who by rule can not participate in the game because he started Sunday, was five outs away from a possible no-hitter before gave up a one-out single to left-handed-hitting Jake Lamb in the eighth. "It hasn't worked out for me, but I'll take the complete-game shutout anytime". I'll take the shutout.
"I don't think a one-hit shutout ever stings", Bumgarner said.
Bumgarner will take part in the pregame player introductions Tuesday but is ineligible to pitch because he started Sunday. Cueto and Bumgarner have combined for seven complete games this season; no other NL team has more than three.
The Giants enter the All-Star break with the best record in all of Major League Baseball.
Brandon Crawford drove in three runs with a sacrifice fly in the first and a two-run single in the seventh. "Guys are getting on base and giving me a chance to drive them in".
Bumgarner (10-4) did not have his hardest fastball, only topping out at 92 miles per hour, but his curveball kicked like a mule. Another look did not help the Diamondbacks.
Jake Lamb broke up Bumgarner's bid with a single. Blanco was shaded toward center and appeared to get a late break but got under the ball before it hit his glove and bounced out. He rung up Brandon Drury on three pitches - called strike on a cutter, fouled curve and a fastball that slipped past a swing into Buster Posey's mitt.
Bumgarner had 13 strikeouts and no walks through six innings.
The sellout crowd only got louder from there, as fans sensed what they might be witnessing. Giants manager Bruce Bochy clearly had the same premonition, since he replaced third baseman Conor Gillaspie with a better defender, Ruben Tejada, to start the sixth. "We're seeing light at the end of the tunnel", Bochy said.
The Giants' ace has been even better than usual this season as he enters Sunday's start with the best ERA in his career (2.09), his best strikeout percentage (27 percent) and his 2nd-best miss percentage (27 percent).
Bumgarner waved both hands in the air, and Sergio Romo scampered to the bullpen mound.
Rickie Weeks Jr. drew a leadoff walk in the ninth, but Bumgarner retired Nick Ahmed on an infield pop-up then got Jean Segura to ground into a game-ending double play.