Bobby Tolan looked as if he was the second coming of Vada Pinson his first couple of seasons with the Reds, which was appropriate since the Reds acquired Tolan for Pinson before the 1969 season, a trade that also brought the Reds Wayne Granger. Granger had 2 or 3 good seasons as a Reds relief pitcher and made the Reds HOF. Tolan had two great seasons and one good season as a Red but is not in the Reds HOF.
In 1969 Tolan had a batting line of .305 BA/.347 OBP/.474 SLG with 21 HR, 93 RBI (9th in NL) and 26 steals. In 1970, as foster15 noted, Tolan lead the NL with 57 stolen bases, and he also hit .316/.384/.475 with 16 HR and 80 RBI. He also played good defense in centerfield, second in the NL in putouts in 1970, and lead the NL in putouts in 1972. He missed all of 1971 after injuring his Achilles tendon in an off-season basketball game. In 1972 he hit .283/.334/.386 with 8 HR and 82 RBI, and 42 stolen bases. His WAR scores for 1969, 1970 and 1972 were 5.3, 5.4, and 4.9. His numbers in those seasons could be placed in Vada Pinson's career stats and not look out of place.
Sadly, his career collapsed after 1972, and he left the Reds under a bit of a cloud following the 1973 season, when he was still only 27 years old. He bounced around with the Padres, Phils and Pirates, and was out of the majors by 1979.
Were his three great/good seasons enough for the Reds HOF? I don't know. It does seem to me that if Wayne Granger deserved to be inducted, then so does Tolan.