DENVER -- Since Barry Bonds’ final season with the Giants in 2007, San Francisco has had 26 different left fielders.

One of them made his season debut against the Rockies at Coors Field on Tuesday night after being called up from Triple-A Sacramento, where he slugged nine home runs in 23 games, including three on Monday night. In Denver less than 24 hours later, he didn’t miss a beat.

Mac Williamson has gone through a lot to get back to the Major Leagues, and his 2-for-4 performance in the Giants’ 14-4 victory over Colorado, which included a home run and four RBIs, yielded a glimpse of what the future could hold for San Francisco: a left fielder who has staying power.

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“Mac’s going to give us depth in this lineup, and more power,” manager Bruce Bochy said. “There’s a little more of a fear factor with Mac in there.”

“Fear factor” isn’t exactly a descriptor that would be used for San Francisco’s lineup up to this point in the season. The Giants entered play Tuesday tied for last in the Majors with a 68 wRC+, and 26th in baseball with 30 home runs, less than half the number the MLB-leading Mariners have hit.

While offseason acquisitions made with the hopes of bolstering an anemic lineup didn’t pan out -- Cameron Maybin, Yangervis Solarte and Gerardo Parra, among others, are all gone -- could the answer have been under the Giants' noses all along, working on his stance and swing in the Minors so he could be ready for this moment?

“I didn’t have the spring I wanted, didn’t perform the way I wanted to, didn’t give them a reason to keep me on the roster,” said Williamson, who hit .237 with a homer in 22 Cactus League games. “I knew I had to put my nose to the grindstone and make my case to come back up here.”

Williamson suffered a concussion when he slammed headfirst into the wall down the left-field line in San Francisco after chasing a fly ball on April 24 of last season. Following a callup just days earlier, he had been off to a fast start at the plate, hitting .316 with three homers over his first five games. But he was never healthy after that, returning in May but unable to produce at the plate.

“Last year was the shining moment, right?” Williamson said. “And then I get hurt. Everyone knows about the concussion, but I don’t think people really realized how bad off I was for the rest of the year. To me, I discount any stat that happened after that in 2018, because I couldn’t see straight. I had blurred vision [until September].”

The Giants’ offensive woes are well documented, but could there be light at the end of the tunnel? It was only one game, but if Williamson and his revamped approach at the plate, as well as Buster Posey’s recent resurgence (he’s hitting .295 with six doubles and a pair of homers in the last 13 games) lasts, this lineup could look a lot different.

Even Evan Longoria, who entered Tuesday with a .664 OPS, had a big game, going 2-for-3 with a homer and three runs scored.

It’s just one game. But there’s a conceivable path to a lineup with more life.

“You know what, you have to be encouraged,” Bochy said. “These guys are starting to see the ball better, they’re swinging better. … I think when that happens, it can make everybody else better. Knock on wood, that’s what’s going to happen.”

Meanwhile, Tuesday’s starter, Madison Bumgarner, though not at his sharpest, maintained the uptick in velocity he showed in his previous start, which was his finest of the season to date. The big left-hander’s two-seamer averaged 92 mph, and his cutter averaged 87.2 mph.

Add in a Jeff Samardzija, who, before a rough outing in Cincinnati over the weekend, had opened the season with a 2.53 ERA over his first six starts, as well as a bullpen with an National League-best 3.31 ERA, and things are starting to look up for San Francisco. “Up,” of course, being anywhere but last place in the NL West, where the club currently resides.

It was just one game, but a game that teemed with possibilities. Williamson called back to headier days in Giants lore to underscore the unique routes the club has taken to success in the past.

“That’s what this team has done such a good job of in the past,” he said. “They weren’t necessarily the best team in the league in 2010, ‘12 and ‘14 [when they won three World Series championships], but they knew how to play together and win, and be selfless.”

At 16-20, the Giants aren’t where they wanted to be on May 7, but the good news is, it’s only May 7. There’s a lot of baseball left to be played, and Tuesday night offered glimmers of hope.