Because he's the man and does not have his own thread. So Jim Cummings was pretty involved in TLK and TLK 2, he voiced several characters in the first film including the gopher, he also voiced Ed and sang the latter part of "Be Prepared" as Scar. Jeremy Irons damaged his vocals doing the "YOU WON'T GET A SNIFF WITHOUT ME!" part and Jim Cummings sang the remainder of the song and did a fantastic job, I didn't even notice the voice change until he mentioned it during an interview.
He also voiced Scar in TLK2 during the nightmare scene and Ed again in TLK3 and wrote Pumbaa's verse of "Hakuna Matatta" Originally the lyrics were actually Pumbaa talking about how he had a difficult past and that Simba should stop complaining but the lyrics were not finalized at the time (obviously) and Cummings wrote the fart verse because he thought the verse needed to fit the style of the rest of the song more.
So yeah, pretty epic man. Aside from TLK you'll hear his voice in many other animations and video games too, he even narrates Reflections of Earth at Epcot in WDW, too.