Roberto Martinez's men were in danger of the drop last season but turned things around in the final weeks of the campaign to avoid going down.
They are in danger of becoming embroiled in another relegation scrap this term, sitting 17th in the table with just one win from their last nine league games and outside the bottom three only on goal difference.
Martinez reinforced his squad with the addition of Honduras international midfielder Espinoza earlier this month on a free transfer from Major League Soccer club Kansas City.
The 26-year-old, who made his debut in Tuesday's 1-0 FA Cup third-round replay win at Bournemouth, believes Wigan have the players needed to survive this season.
He told the Daily Star: "I have been watching the Premier League for as long as I can remember - and I have seen enough in the squad to know we can survive."