Just finished a year where I made the wild card and finished 3rd in the league (NL) in runs, with 826.

I'll make a couple of  minor tweaks in my batting roster and maybe expend some cash in he FA market on a bonking RF.

One of my roster spots will go to one of these three guys:  Which one?

SteveMartin          JoakimLucano          EdSutton

Martin has been a platoon guy against LHP but moslty a bench bat.  Wish he had a better glove, but he does walk and have some pop.

Lucano came up last year and was only decent.  He certainly doesn't have much pop, but has a decent glove and would be a fine 4th OF

Sutton would be used as part of 2B platoon if his OBP held up.  Good glove, could spell my CF.  Pretty flexable.

We should roll over today, tomorrow or Tuesday.  I'm eager to see if Sutton's numbers improve some.  The other guy's numbers look set

Which guy do you like?

moe

I dont think Martin should be higher than AA

Martin will smash 30+ homeruns, but have an average of about .235

If you can handle that, maybe put him in the 8th spot, he'd be valuable. That Power+Eye makes him good enough to play some ML ball. 

Lucano is the opposite of Martin. If you need someone to get on base, he'll do that, but he won't steal many bases (I'd put him at the bottom of the lineup as well).

Sutton has low splits, no power, and bad baserunning. His contact and eye are good, but he'd be the last guy I'd pick of the three.

So, do you need a bonker who won't have a great line, or a guy who gets on base but won't bring runners home? Depends on your needs.

pick the one who would be the most helpful glove

I cannot believe Martin's stats.  Theres no way he should have anything close to that

Give to Sutton.

Sutton, not that close.

None of the three.

None. All 3 look like AAA players.
FYI:  Sutton is left-handed and should never be used at 2B. For a CFer, range is the most important rating, so you really don't want him there either.
I'd recommend filling your bench with useful defensive players. You could probably find someone left in the FA pool at the end of free agency who can field anywhere and hit about as good as these guys for between $1-2M, or less if they have low durability.