Nathan, who just turned 42, pitched ten games last year, totaling only six and a third innings, between the Giants and the Cubs. He missed the entire 2015 season except for one third of an inning on Opening Day. I suppose it’s possible he still has something left in the tank but I’d say his chances of making the roster are long.
Albers pitched in 58 games for the White Sox last year, buy boy howdy did he struggle. He posted a 6.31 ERA and an unsightly 1.675 WHIP and an unacceptable strikeout to walk ratio of 1.58. He pitched wonderfully in 30 games in 2015 however, and relievers are weird and unpredictable, so maybe he has a bounceback in him.