In similar fashion to the with/without Lucas comparison I did one for the player who I actually think has been our most effective since he joined the club: Daniel Sturridge. When you look at his attributes he just offers so much in his all-round game. To me, he's always been more
effective than Suarez in terms of winning you games. Suarez is more the more spectacular footballer, sure, he tries the lower percentage things and pulls them off slightly more often than your average striker. But Sturridge just does a few important things better. He's quicker, he has neater technique when moving with the ball and he is less wasteful in possession. Also, Suarez is one-paced. Sturridge can make the ball stick in the final third if you need it as well as take the short route if the situation requires.
He changes the dynamic dramatically when he's on the pitch. He can do the Michael Owen shoulder-of-the-last-defender thing better than Michael Owen could. He can go out wide for 5 minutes and skin the full back a few times. We've seen him put some wicked crosses in since he's been here (crosses for Balotelli at Spurs and for Lambert at City this season being the most recent examples; cross for Suarez at home to Chelsea 12/13 being my favourite). He can drop into midfield for a while as well. He really impressed me at Fulham away last year, a new level of maturity from him. And whilst all the back pages were full of Gerrard celebrating his winning penalty (rightly so, what a moment) it was Sturridge who got us a hand back in that game second half after scoring the equaliser in the first. First dropping into midfield because we were struggling to move the ball quick enough, finding Coutinho on the edge of the area who turned and scored. Then he went over to the left and tormented their full back into conceding the aforementioned penalty.
...I'll stop here and post the stats before this turns into a love letter.
Firstly, sample size. This is only two years worth of data. I used 4.5 seasons worth of data for the Lucas as ideally I'd like 5 seasons. I think 5 years of about 50/50 with/without games is probably the sweet spot. Less than two/three years of data and you're probably to open to variance in a teams natural deviation of performances over that period. Anything longer than 5-6 years and maybe some of the data starts to become meaningless. The team, the players around your subject, the manager's systems and even the game of football itself have changed too much for it to be relevant. I might be wrong in that case though.
I could've included the first half of the season 12/13 before we signed him to further nail the difference I think he causes. But as Coutinho was also signed at the same time who has also contributed a decent amount I thought it would be unfair.
Again, similar to Lucas, Sturridge has played in marginally more difficult games than ones he's missed so any argument of "Oh, well he's probably missed a disproportionate amount of difficult ties" can't be made.
Also these only include games that he's started. If I could be arsed I could do this on a minute by minute basis which could show all the games where he's come on and made a massive difference which would surely push the gap wider (debut vs United, comes on at HT and we win the 2nd half. Chelsea at home 12/13 comes on at HT and wins us the half again. Goodison Park last season, comes on and grabs the equaliser. Stoke away after his injury.)
Anyway, the bottom lines:
22% higher win rate. 0.66 points per game better off. 0.74 goals per game better off.
In the 40 games he has started, we have lost 4.
Those 4 losses were Southampton away (12/13), Southampton home (13/14), Arsenal away (13/14) and Man City away (14/15). Two of the three most difficult fixtures we generally face and two other still quite difficult ones.
2.25 points per game over 38 games is 86 points.