Schubert, the bass player on that album is Wendell Marshall.
Here are few words about him from 'all music com'
https://www.allmusic.com/artist/wendell-marshall-mn0000244351/biography
discography.... (I guess everyone has some album where he played)
https://en.wikipedia.org/wiki/Wendell_Marshall
one more from Eddie Costa, with Bill Evans and Wendell Marshall
https://youtu.be/FLsgwhjhNpc
Here are few words about him from 'all music com'
https://www.allmusic.com/artist/wendell-marshall-mn0000244351/biography
discography.... (I guess everyone has some album where he played)
https://en.wikipedia.org/wiki/Wendell_Marshall
one more from Eddie Costa, with Bill Evans and Wendell Marshall
https://youtu.be/FLsgwhjhNpc