Good morning! #4 is interesting, as it's either really old or really recent.
Honorable mention: Damian Jackson, Ray Olmedo
5. Al Lakeman (0.2 WAR)
Another day, another catcher. Lakeman played for the Reds from 1942 to 1947, having his most impactful year in 1945. He hit .256/.304/.415 that year, smacking a career high 8 homers as well.
4. Jeffrey Hammonds (2.7 WAR)
Hammonds was a Reds outfielder from 1998 to 1999, but played mostly in a reserve role here. He played for 6 teams overall in a 13 year career, but had his best year immediately after leaving Cincinnati. Oh well.
3. Kiki Cuyler (3.2 WAR)
Cuyler was an outfielder by trade, but was in the twilight of his career by the time he got to the Reds. He had a lot of great years with both Pittsburgh and Chicago prior to that, though, and hit .326/.380/.453 in 1936, which wasn't too shabby. He's a Hall of Famer.
2. Ernie Lombardi (6.5 WAR)
So is he. Lombardi was the epitome of Reds catchers pre-Bench, but to his detriment in this competition, wore 6 different numbers in his career. He wore #4 from 1939 to 1941, though, which is pretty important. He had 31.3 total WAR with the Reds, though, and won the MVP in 1938. He made 5 All-Star teams with the Reds.
1. Brandon Phillips (24.4 WAR)
Dat Dude himself is the quintessential #4, and it couldn't have gone anywhere else. He's going to be tough one to top there, with 4 Gold Gloves, 3 All-Star games (so far), and is about to embark on his 9th season as the Reds starting 2B.