I'll point out three things:
First, of those three vets, Napoli did put up great numbers during the regular season he was with us.
Second, I have read numerous articles on Giambi, little less on Napoli, and nothing on Nixon(like, ever) that coaches and managers, including Tito, saying that using that last roster spot on these types of vets, even when not really producing, can not be measured in what they bring to the clubhouse and to leadership with younger players.
When I read quotes from someone like Tito, or Sandy, saying that kind of stuff, I take their word for it.
Third, I in no way think not having a Nixon/Giambi/Napoli is the issue. I mean, if Santana does not qualify as that veteran bat(and veteran leader), no one does.
Bonus round: Ellis Burks was the greatest vet bat this team has brought in since the 90's resurgence, and yes, I am factoring in Murray.