Hal Schumacher played his entire MLB career with the New York Giants, where he flirted with being an ace for a brief period.

Schumacher debuted in 1931 but began a three-year run in 1933, where he was a massive part of New York's success.  An All-Star in 1933 and 1935, Schumacher went 19-12 with a 2.16 ERA while leading the NL in H/9 (6.9), and he would help lead the Giants to a World Series win, gaining a decision in the Fall Classic.  It was his only World Series Title, but not his only good year. 

In the year between his two All-Stars (1934), Schumacher had what could be considered his best regular season, at least in terms of Wins (23) and MVP voting (9^th).  Following 1935, Schumacher was a middle-of-the-road Starter, never winning more than 13 Games, though he was far from a liability.  He left the Majors for the American Military in World War II, missing three years (1943-45), and returned for one last season in 1946.

Overall, Schumacher had a record of 158-121 with a 3.36 ERA.

Art Fletcher is thought of more by baseball pundits for his time as a Coach for the New York Yankees, but as a player, he is arguably the greatest defensive player in Giants history.

Holding the franchise record for Defensive bWAR (25.9) and a three-time league leader in that stat, Fletcher was also first in Assists four times.  Offensively, Fletcher was no star, but he accumulated 1,311 hits, batted .275 for New York, and mastered the selfless art of being hit by pitches, leading the NL in that statistic four times.

The Giants made the World Series (though lost) with Fletcher as their Shortstop four times.  You have to be a pretty good ballplayer to be a starting Shortstop for that to happen.

You don’t acquire the nickname of “The Freak” as an athlete when you are undersized.  Well, that is unless you are Tim Lincecum.

The Golden Spikes winner from the University of Washington stood at 5" 11" and 170 pounds, and with a choir boy face, he did not look like a power pitcher, but he was not only as a Husky but for the Giants, who used a First Round Pick (10^thOverall) to take him in 2006.

Lincecum only needed one year to make it to the main roster, and in his sophomore year, he was named the Cy Young winner after posting an 18-5 record, a 2.62 ERA while leading the NL in Strikeouts (265), ERA+ (168), FIP (2.62), H/9 (7.2) and SO/9 (10.5).  It was the best season of his career but not his last great one.

The right-hander joined the elite group by becoming a back-to-back Cy Young winner.  Lincecum’s 2009 saw the Pitcher go 15-7 with a 2.48 ERA (his best) while again finishing first in Strikeouts (261) while again topping the NL in FIP (2.34).  These were Lincecum’s best years, but not his peak period still had some juice.

Lincecum went to his third consecutive All-Star Game in 2010 while also going number one in Ks for the third straight time.  Tenth in Cy Young voting, Lincecum, aced the Giants to their first World Series Title in years, and his star shone the brightest.

Lincecum went to his last All-Star Game in 2011, but following that year, he struggled and was no longer the same dominator he once was.  Every year, Lincecum’s stats eroded, but he was still helpful in their 2012 World Series win.  The Giants again won the World Series in 2014, though Lincecum’s participation was minimal.  He left the Giants for one final year in the Majors with the Angels in 2016, and though his career fizzled, you can’t discount that this is the only two-time Cy Young winner in franchise history.  Lincecum’s overall pitching stats are lower than other moundsmen in franchise history, but his brief period of dominance dwarfs many above him on this list.

Johnny Mize was already a four-time All-Star and two-time MVP runner-up for the St. Louis Cardinals, but the New York Giants coveted the First Baseman, as their player, Babe Young, was about to serve in the military for World War II.  The Giants purchased Mize's contract in 1942, and he had another good year, winning the Slugging Title (.521) and RBI Title (110) while batting .305.  He was named an All-Star, but like so many, Mize had to depart for his military duty and would not return until 1946.

Mize was able to come back in 1946, and though he was in his early 30s, he was still a potent hitter and had his best power seasons in Baseball.  In 1947, he was third in MVP voting, leading the NL in Runs (137), Home Runs (51), and RBIs (137) and batting over .300 for the last time in his career (.302).  Mize again won the Home Run Title in 1948 (41).

As good as Mize remained, the Giants traded him to the Yankees, where he was still a capable batter and would help the Yankees win five consecutive World Series Titles (1949-53).  With the Giants, he blasted 157 Home Runs with a .299 Batting Average.

Mize was finally elected into the Baseball Hall of Fame in 1981 via the Veterans Committee.