Swansea City have signed David N'Gog for an undisclosed fee for the remainder of the season. Buying a player on a 6 month deal is strange, however it is owed to two factors: Swansea's injury crisis and David N'Gog's striking tally.
The first factor is self explanatory, Swansea have had several attacking players out injured this season and it has seriously dampened their goal-scoring prowess. Therefore, as N'gog is a striker with Premier League experience, is rarely injured and he was available, it made sense to get him.
The short term contract is down to the fact N'gog is a 24 year old (soon to be 25 in April) striker, and he has yet to score 10 goals in a domestic campaign. The highest N'gog has ever achieved is 8 last season for Bolton in the Championship, and this season he has only 3 in 17 games.
In the Premier League for his former club Liverpool he scored 9 in 63 games and overall 19 goals in 94 appearances.
Quite clearly Swansea's move for N'gog has been prompted out of desperation to avoid falling into a relegation battle. They needed a striker so they got the nearest one available. Essentially, the contract signed is a probational period. If he does well he will most likely be offered a more permanent deal; if he does badly, it did not cost Swansea too much.