Second-string and Inconsequential

adjective

• Being a replacement or substitute for a regular member of a team.
  • usage: "a second-string pitcher"

adjective

• Lacking worth or importance.
  • usage: "his work seems trivial and inconsequential"; "the quite inconsequent fellow was managed like a puppet"
  • synonyms: inconsequent
• Not following logically as a consequence. .

(a.) Not regularly following from the premises; hence, irrelevant; unimportant; of no consequence.